MATLAB: Is ‘print’ creating a csv file

Question

I'm trying to save a plot as a high dpi png, however, matlab keeps svaing the output as a csv. Why is this? My code is as follows:

% Plots spectrum from E4407B Spectrum Analyser
filetoopen = '400kbps_10db_0,096k_spectrum.CSV';
% Workings
close all;
datafromfile = csvread(filetoopen, 15, 0);
freq = datafromfile(:,1);
power = datafromfile(:,2);
axisMHz = freq .* 0.000001;
filenamecomma = regexprep(filetoopen, '_', ' ');
filename = regexprep(filenamecomma, ',', '.');
expression = '(^|[\. ])\s*.';
replace = '${upper($0)}';
filename = regexprep(filename,expression,replace);
filename = newStr(1:end-4);
figure(1);    
plot(axisMHz, power);
xlabel('Frequency (MHz)');
ylabel('Power (dBm)');
title(newStr);
print(gcf, filenamecomma, '-dpng', '-r300');

I've also included an example data file. Thanks in advance.

Answer 1

Perhaps because you’re telling it to?

Running these lines:

filetoopen = '400kbps_10db_0,096k_spectrum.CSV';
filenamecomma = regexprep(filetoopen, '_', ' ')

produces:

filenamecomma =
    '400kbps 10db 0,096k spectrum.CSV'

which is what print is saving to:

    print(gcf, filenamecomma, '-dpng', '-r300');

Mystery solved!