title: Convert geographical coordinates using measurements package
body: <p>I am trying to convert some data with the indicated measurements package, but I'm not succeeding on it. </p>
  
  <p>My data:</p>
  
  <pre><code>Long        Lat
  62ᵒ36.080   58ᵒ52.940
  61ᵒ28.020   54ᵒ59.940
  62ᵒ07.571   56ᵒ48.873
  62ᵒ04.929   57ᵒ33.605
  63ᵒ01.419   60ᵒ30.349
  63ᵒ09.555   61ᵒ29.199
  63ᵒ43.499   61ᵒ23.590
  64ᵒ34.175   62ᵒ30.304
  63ᵒ16.342   59ᵒ16.437
  60ᵒ55.090   54ᵒ49.269
  61ᵒ28.013   54ᵒ59.928
  62ᵒ07.868   56ᵒ48.040
  62ᵒ04.719   57ᵒ32.120
  62ᵒ36.083   58ᵒ51.766
  63ᵒ01.644   60ᵒ30.714
  64ᵒ33.897   62ᵒ30.772
  63ᵒ43.604   61ᵒ23.426
  63ᵒ09.288   61ᵒ29.888
  63ᵒ16.722   59ᵒ16.204
  </code></pre>
  
  <p>What I'm trying:</p>
  
  <pre><code>library(measurements)
  
  library(readxl)
  
  coord = read.table('coord_converter.txt', header = T, stringsAsFactors = F) 
  
  # change the degree symbol to a space
  lat = gsub('°','', coord$Lat)
  long = gsub('°','', coord$Long)
  
  # convert from decimal minutes to decimal degrees
  lat = measurements::conv_unit(lat, from = 'deg_dec_min', to = 'dec_deg')
  long = measurements::conv_unit(long, from = 'deg_dec_min', to = 'dec_deg')
  </code></pre>
  
  <p>What I'm getting with this penultimate line:</p>
  
  <p>Warning messages:</p>
  
  <ol>
  <li>In <code>split(as.numeric(unlist(strsplit(x, " "))) * c(3600, 60), f = rep(1:length(x)</code>,  :  <code>NAs introduced by coercion</code></li>
  <li>In <code>as.numeric(unlist(strsplit(x, " "))) * c(3600, 60)</code> :  <code>longer object length is not a multiple of shorter object length</code></li>
  <li>In <code>split.default(as.numeric(unlist(strsplit(x, " "))) * c(3600,</code>  :  <code>data length is not a multiple of split variable</code></li>
  </ol>
  
  <p>Can someone point my mistake or make a suggestion of how to proceed?</p>
  
  <p>Thank you!</p>