text: 15.
  Ben Barrowes (2020). Multiple Precision Toolbox for MATLAB (), MATLAB Central File Exchange. Retrieved .
  Inspired: GEM Library, Variable Precision Integer Arithmetic, HPF - a big decimal class
  Create scripts with code, output, and formatted text in a single executable document.
  Carl Witthoft (view profile)
  Dunno what typo that was, but swox.com is not what you meant. how about
  Neal Morgan (view profile)
  Please update the instructions to install this in windows 10 and Matlab R2019b. I got MinGW and it's library download options included gmp and mpfr. I tried using those dll's in place of ones from the old website links in the readme (one of the readme links is clearly to something completely unrelated).
  Umut Sayin (view profile)
  I would really like to see a roots and poly function in this set since this commands have serious issues with low precision while calculating roots or polynomials
  Sergio Sanz (view profile)
  Hello:
  I've downloaded the last version but I can't find any updated instructions to install it on Windows 10.
  Could anybody tell me something about this?
  Thanx in advance. :-)
  Ben Barrowes (view profile)
  WRT Pavel's comment. I zeroed out digits past 15 or 16 so that the mp number would "look" like the double. But perhaps he is right that I should not do this. In mp.m, mpfr_construct_dd calls mpfr_init_set_d which eventually sets the multiple precision number to the number nearest the double rounded in the direction GMP_RNDN. As he says, mp_TESTING seems to run fine with those lines commented.
  I have commented out the lines he suggested and uploaded a new version.
  yu xiao (view profile)
  @tao length @Theo How to set Xcode？thank you
  my platform is:
  OS X 10.10.5
  Matlab R2016b
  Xcode 7.0.1
  ---------------------------------
  And typing: “clang -v”, I see
  Apple LLVM version 7.0.0 (clang-700.0.72)
  Target: x86_64-apple-darwin14.5.0
  Thread model: posix
  --------------------------------
  typing: “mex -setup”,it's ok.
  but when typing" mp_compile_all", i see
  compiling: mex gmp_prototype.c -lmpfr -lgmp -I/usr/local/include/ -L/usr/local/lib/
  Compile with 'Xcode with Clang'.
  Misuse of mex
  /Users/MATLAB/waveform/mptoolbox_1.2/@mp/private/gmp_prototype.c:2:10: error: 'mpfr.h' file not
  found with <angled> include; use "quotes" instead
  #include <mpfr.h>
  ^~~~~~~~
  "mpfr.h"
  In file included from /Users/MATLAB/waveform/mptoolbox_1.2/@mp/private/gmp_prototype.c:2:
  /Users/MATLAB/waveform/mptoolbox_1.2/@mp/private/mpfr.h:52:10: error: 'gmp.h' file not found with
  <angled> include; use "quotes" instead
  #include <gmp.h>
  ^~~~~~~
  "gmp.h"
  2 errors generated.
  How to set Xcode？
  Pavel Kyshtymov (view profile)
  Nice tool, but there is a ridiculous bug that leads to imprecise conversion of double precision numbers to mp.
  Here is a simple demo:
  >> x = -1e-1-9.9e-16;
  >> abs(x-double(mp(x,1000)))/eps(x)
  ans =
  71
  A deliberately selected double precision number is converted forth to mp with 1000 bits of precision and back to double precision. Resulting value differs from the original one by 71 ULP!
  It is likely that this issue is resolved by removing lines 39-41 and 46-48 of mp..m. The author zeroes 17:end digits in a string representation of the input number, assuming that the double precision provides no more than ~16 accurate digits. Due to inherent misalignment of base-10 and base-2 representations, such a voluntaristic truncation may result in an error of up to 1e-16/eps(1e-1) ~= 7.2 ULP, Moreover, the code does not account for the minus char that is present for a negative value, in which case the mp number is left with only 15 digits of precision and tenfold error bound of ~72 ULP.
  I don't understand the motivation behind this truncation. Simple removal of this step does not change results of mp_TESTING and mp_TESTING2 scripts. Whether of not it influences the memory/efficiency footprint - I haven't conducted any experiments on this..
  Fabio (view profile)
  Hi, with Matlab 2016b under Linux I get the following error:
  mp_TESTING2
  Assignment between unlike types is not allowed.
  Error in mp/subsasgn (line 6)
  out=builtin('subsasgn',x,varargin{:});
  Error in mp_myqr (line 78)
  R(m,n)=0;
  Error in mp/qr (line 7)
  [Q,R]=mp_myqr(x,flag);
  Error in mp_mysvd (line 265)
  [U,dummy]=qr(dummy);
  Error in mp/svd (line 6)
  [U,S,V]=mp_mysvd(A);
  Error in mp/norm (line 61)
  s=max(svd(a));
  Error in mp_TESTING2 (line 8)
  c_mp=norm(asin(sin(a42))-a42);disp(['2.1 sin/asin' setstr(9) num2str(c_mp)])
  Zheng (view profile)
  I want to thank Ben Barrowes for creating this toolbox and everyone contributing for more tips for installation.
  Is there a mp version for Eigenvalues and eigenvectors eig?
  tao length (view profile)
  I successfully installed the package on
  OS X 10.11.4
  Matlab R2015b
  Xcode 7.3.1
  The install steps:
  1. Install Xcode and command-line-tools
  2. Install gmp and fpmr lib.
  e.g. brew install xxx
  3. modify mexopt so that matlab could find compiler
  see
  4. Download mptoolbox and unpack.
  5. !!! NOTE !!!
  The compilation is done NOT in /Applications/MATLABxxx as the install instruction suggested, but in the unpacked folder.
  Go into private dir, modify the mp_complie_all.m as mac install instruction said,
  and change the mex command as @Theo suggested
  mex([dd(ii).name], '-I/opt/local/include/', '-L/opt/local/lib/', '-lmpfr', '-lgmp')
  and then in matlab, run it under private dir.
  6. Go back to unpacked dir,
  now we can use mp_TESTING.m and mp_TESTING2.m
  7. If you want to use mptoolbox somewhere else, make sure the unpacked dir is in your load path, or the dir where @mp is in your load path. Otherwise, matlab can't find the mp class.
  Lourenço Peixoto (view profile)
  I have followed the "Step-by-step instructions" to installation on a Mac (@mp/install_mac).
  My platform is:
  MacBookPro
  OS X El Capitan 10.11.3
  MATLAB_R2011a_Student
  I have installed XCode 7.2.1
  When I type "sudo /usr/sbin/gcc_select 3.3" on Terminal Window I see:
  sudo: /usr/sbin/gcc_select: command not found
  And typing: “gcc -v”, I see
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/c++/4.2.1
  Apple LLVM version 7.0.2 (clang-700.1.81)
  Target: x86_64-apple-darwin15.3.0
  Thread model: posix
  Theo (view profile)
  I want to thank Ben Barrowes for creating this toolbox. It seems to work very well for my purposes. I want to make a few notes:
  1. I managed to successfully get this working on OSX 10.10 using Matlab 2015a. There are a few changes I note in the install_mac instructions.
  a) It's easy to use Macports to install gmp and mpfr. You will need to change the linking directories to /opt/local instead of /usr/local (run "port contents mpfr" to check where it has installed)
  b) The syntax adjustment calling the mex command did not work for me. I had to use instead (notice arguments are passed one by one in strings)
  mex([dd(ii).name], '-I/opt/local/include/', '-L/opt/local/lib/', '-lmpfr', '-lgmp')
  2..
  3. Finally, I want to just comment that I think it is in poor taste that the developer for a paid toolbox is commenting in this page to people who need help, in order to advertise his product. For my purposes, this free product (mptoolbox) worked just fine. Give it a shot.
  Theo (view profile).
  Benjamin K. (view profile)
  Unfortunately, this does not compile on my Mac. When running install_mac, I get (the [...] indicate the path of the mp toolbox):
  [...]/mptoolbox_1.2/@mp/install_mac ; exit;
  [...]/mptoolbox_1.2/@mp/install_mac: line 1: bill@banasclan.com: No such file or directory
  [...]/mptoolbox_1.2/@mp/install_mac: line 7: Installation: command not found
  [...]/mptoolbox_1.2/@mp/install_mac: line 9: syntax error near unexpected token `('
  [...]/mptoolbox_1.2/@mp/install_mac: line 9: `PowerBook G4 (12" PowerBook6,1 867 MHz PowerPC G4 3.3)'
  Mehdi (view profile)
  Sascha D. Krauß (view profile)
  edu (view profile)
  When I run mp_compile_all.m I encounter with following message:
  MATLABROOT =
  D:\MATLAB\R2012a
  C:\MinGW\bin\dlltool: Can't open def file: ../../extern/include/libmex.def
  ans =
  1
  C:\MinGW\bin\dlltool: Can't open def file: ../../extern/include/libmat.def
  ans =
  1
  C:\MinGW\bin\dlltool: Can't open def file: ../../extern/include/libmx.def
  ans =
  1
  The syntax of the command is incorrect.
  ans =
  1
  The syntax of the command is incorrect.
  ans =
  1
  The syntax of the command is incorrect.
  ans =
  1
  compiling: gmp_prototype.c
  txt =
  
  compiling: mpfr_absc.c
  txt =
  
  compiling: mpfr_add.c
  txt =
  
  compiling: mpfr_atan2.c
  txt =
  
  compiling: mpfr_ceil.c
  txt =
  
  compiling: mpfr_const_log2.c
  txt =
  
  Operation terminated by user during mp_compile_all (line 54)
  ------------------
  Then when I run the mp_TESTING.m I encounter eith the same problem of Sascha Krauß . Can anyone help me?
  Sascha D. Krauß (view profile)
  I'm sorry, I haven't used it for a year and can't remember the solution. (Or even the problem.) Maybe I can have another look, when I'm back in office on Monday, but I don't think, that it will help much...
  edu (view profile)
  Hi, I have downloaded this toolbox but I dont know how it works. I have set the path of extracted toolbox in my Matlab's search path but it doesnt work!
  Actually I have the same problem of Haula Dias.
  Hasula Dias (view profile)
  Hi Sascha, can you please explain how you fixed that problem ? I'm getting the same error when I try to run the test program,i.e,
  Undefined function or method 'mpfr_construct_dd' for input
  arguments of type 'double'
  I don't see a mfile with the same name ?!..
  Sascha D. Krauß (view profile)
  Problem solved.
  (Why is there no edit or delete function?)
  Sascha D. Krauß (view profile)
  When I try the examples from the readme file, I get the following error. Why? (GMP and MPFR are installed. I use Ubuntu 11.10 and Matlab R2011b 64-bit.)
  >> ymp=mp(2,1000)
  Undefined function 'mpfr_construct_dd' for input arguments of type 'double'.
  Error in mp (line 27)
  [str,exponent]=mpfr_construct_dd(real(x(ii)),precision);
  Pavel Holoborodko (view profile)
  @Ahmed Fasih
  Try Multiprecision Computing Toolbox from here:
  It supports 32 and 64-bit versions of Windows and the latest Matlabs. Easily installed in a few seconds, no compilation required - everything are installed and tuned automatically for the best performance on your CPU.
  @Charles
  Mas OS X (64-bit) and Linux (32 & 64-bit) are also supported. No compilation is required.
  Multiprecision Computing Toolbox from Advanpix supports much wider set of MATLAB functions missing in the submission, including eig, det, cond, fft/ifft, chol, fzero, null to name a few. Many advanced numerical methods are supported too - matrix functions, optimization, ODE, root finding, special functions, numerical integration, etc....
  Ahmed Fasih (view profile)
  Any updates on getting this easily going on Win64 with R2011 or R2012? The pre-compiled binaries are DLLs, I can't seem to load them with newer Matlabs, while the compilation seems to need .def files (libmex.def, libmat.def, etc.) which are unavailable in newer Matlabs.
  David Goldsmith (view profile)
  Also, is the cast of a struct into a class the only sense in which this thing is a class? That's kind of weak.
  David Goldsmith (view profile)
  "The mp toolbox is only implemented for base 10 quantities"
  Does this mean that the IEEE 754-2008 32-bit base 2 format, which results in a variable number of ~7.225 digits precision in decimal, can't be represented precisely?
  Christo Fogelberg (view profile)
  Charles (view profile)
  Anyone have this working on the latest mac os x (10.6.4) and matlab r2010a? or have compiled win64 libraries?
  Paul Hur (view profile)
  This is awesome. It will greatly help me with calculation of my equations. However, I cannot find a function for gammainc. Is there anybody who has this function of window version and helps me?
  Dmitry Savransky (view profile)
  Absolutely fantastic. Exactly what I needed - many thanks. Quick note for anyone installing on RHEL5. The default rpms that may be pre-installed for GMP don't seem to work when it comes time to compile the c files. However, if you get rid of these and compile GMP and MPFR from source, everything works great.
  Nigel Delaney (view profile).
  Brent Ware (view profile)
  Anyone had any luck getting this to work with recent versions of OS X? The old instructions don't seem to work.
  Kevin Mitchell (view profile)
  Beautiful! This rivals laprint.m () for packages that really should be included with Matlab by default.
  Kevin Mitchell (view profile)
  Windows version here:
  can anyone tell me how exactly to install the binaries in windows? thanks
  It's really useful and greate soft
  When installing in suse 10.1, I found it necessary to explicitly provide the path '/usr/local/lib' in the mp_compile_all.m file as that is where my lmpfr libraries were
  e.g. If you get the error
  mex: link of 'mpfr_something.mexglx' failed.
  Then change lines 12 & 13 to
  disp(['compiling: mex ',dd(ii).name,' -L/usr/local/lib -lmpfr -lgmp'])
  mex([dd(ii).name],'-L/usr/local/lib -lmpfr -lgmp');
  Installed on windows, and works well. It's slow, so it would be difficult to use with any fitting program. We found a couple of bugs and contacted Mr. Barrowes, who was very receptive and replied quickly and enthusiastically. Recommended!
  Some small precisions (1-2) can cause Matlab to break. Some operations cause memory dump errors , maybe this is due to passing illegal arguments somewhere to mex functions.
  The GMP mex wrapper functions work well with the supported dlls on a windows XP for these it is worth using it and writing your own m-class around them.
  I got this system working well on xp-based Matlab, R13 but I never got the compilation to work, an error about missing h-files came up. Anyway, there is no need to compile it as it worked fine using the dll files from Lopes. Before I could use it, I needed to put some work on it a bit and rewrite a few of the m-files, but now it seems OK.
  Yes, like other pointed out already, the calculations do become very, very slow, but at least I became able to see what happens when using more digits.
  Slower as expected, but still an Excellent tool. (But the Windows installation guide is difficult to understand).
  Thanks
  Installation fails on Windows! Documentation is more than bad!
  Really excellent. However it can be improved, e.g.: (i) some functions are really slow when applied to large matrices (e.g. the overloaded function "prod") and (ii) it worked for me under Matlab 7.3 (2006b) but not under Matlab 6.5. I give a five star rating since this toolbox fills a serious gap into the Matlab numeric representation capabilities.
  I were able to compile it for R13 under Windows, but failed miserably to do so for 7.0 and 7.2.
  If anyone needs such version contact me to describe what I did.
  I added some other test to the toolbox, and overall it appears to run fine.
  For those who are interested in using gcc of cgywin please see:
  Well, in Linux (Fedora Code 4 and Ubuntu) the installation was successful. Actually, on the line 7 of the file mp_compile_all.m:
  mex([dd(ii).name,' mpfr_atan2.c'],'-lmpfr -lgmp');
  i had to delete ",' mpfr_atan2.c'", otherwise an error is produced. But well, it works pretty great ;) But it would be nice if some functins were included or completed. For exemple, the mrdivide.m function is not fully functional, so we can't accomplish operations where inv of a matrix is required. Usually, mrdivide(A,B) does the same as A*inv(B), but hugely faster and more accurate (inv is neither included).
  But, well, this toolbox works really fine. I rate 4 just because it is not fully functional (yet).
  It really seams that this toolbox, as it is, was made to work uniquely under matlab for linux. I tried many diferent things to compile it in matlab for windows (xp) and i couldn't! It could be realy helpfull if instructions/modifications for matlab in windows were provided! I used gcc of cygwin to compile gmp and mpfr, but i can't make a mexopts.bat to gcc on matlab for windows!
  I have the same problems encountered by Zhiyi when attempting installation on a Windows XP platform. It looks like there may need to be some sort of -I or -L mex switch in a mexopts.bat file. I use Lcc for the C compiler.
  I can not compile the C files in it using mex. The compiler can't find mpfr.h