I'm trying to write a function that will take a vector of results and summarize the data into several categories.
I'm having an issue that's really confusing me, here are the first few lines of my function:
function summwriter(resultLogMain, subjectID)
filename = strcat('Results/summData',subjectID,'.txt'); outfile = fopen(filename, 'wt');
numberOfEntries = length(resultLogMain(1,:));
cat1_ln = 0; cat1_hn = 0; cat1_rts = zeros(1, numberOfEntries);
then later I use a "for" loop to fill in some values:
for i = 5:numberOfEntries; %Faces have no influence if resultLogMain(9,i) == 2 && resultLogMain(11,i) == 2; cat1_rts(i) = resultLogMain(2,i); %Subject chose hard task if resultLogMain(1,i) == 1; %12% win trial if resultLogMain(12,i) == 0.12; cat1_ln = cat1_ln + 1; % 88% win trial elseif resultLogMain(12,i) == 0.88; cat1_hn = cat1_hn + 1; end end end end
and then calculate some percentages, averages, and standard deviations
cat1_lp = cat1_ln/(numberOfEntries); cat1_hp = cat1_hn/(numberOfEntries); cat1_rtav = mean(cat1_rts(:)); cat1_rtsd = std(cat1_rts(:));
These excerpts cover one category, there are actually four but I think if I can figure it out for one I can understand the issue. Right now when I run the script it returns the error:
??? Undefined function or variable 'cat1_ln'.
Even though cat1_ln is CLEARLY defined right before the loop to be preallocated and filled in.
Am I doing something very simple very wrong? Does it have something to do with defining a new variable within a function? Any help would be great!
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We see, that you define cat1_ln before the loop. I guess, that the error occurs inside the loop (this would have been cleared, if you post the complete error message, which contains the crashing line). Then it is obvious, that you either have a typo in the code (1 and l looks so similar) or that the already defined variable is removed by a clear.
Does "then later" contain calls of scripts, which use clear all?
Put "workspace" at the beginning of your code
workspace; % Show workspace panel.
to show the workspace panel of variable (if it's not already showing). Then set a breakpoint and step line by line (F10 key) until you see cat1_ln appear, then disappear. Like Jan says - it probably disappears when you execute a clear.