I have a .mat file where three different voltage signal data are given. when i am using the command load name.mat in command it is showing "Error using load
Unable to read file 'name.mat': no such file or directory." Do i have to place that file in particular folder so that matlab can find? 

I have another question how to generate voltage signal from from that file as in that file only values are given.. i have to plot the signal .. so i have to build the signal from the graph...