fid =fopen(datafile.txt','r');
data = textscan(fid, '%f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f');
plot3(data(:,5),data(:,6),data(:,7))
fclose(fid);
I am getting the error:
Error using
plot3
Not enough input arguments.
Where am I going wrong here? my data file is just columns of doubles (hence %f)
This is one of those cases where the error isn't very informative. The problem here isn't that there aren't enough input arguments, it's that they are of the wrong type...
Your problem is that textscan actually returns the loaded data in a 1-by-N cell array, where N is the number of columns (i.e. format specifiers, like %f) in your file. Each cell holds one column of data. You need to extract the contents of the cells using curly braces in order to pass it to plot3, like so:
plot3(data{5}, data{6}, data{7});
data{5}, data{6} and data{7}? I believe the nested cell array contains individual cells where each cell represents a column of what you're looking for. Also data{:, 5} would produce a comma-separated list so I'm not sure what it would produce when being called with plot3.
data{5}, but it should still work even as data{:, 5}, since the first dimension should be of size 1 (the default output from textscan is always 1-by-N, I believe).
datais actually fetching the correct information from the text file?