Indexing numbers only finding NaN

Hi, all,

I am trying to index values from my files that are before a switch condition. The code knows the read at the switch, but I need the value before. I have been messing with it for a couple work days.

%Find the indices of trials before the side of weight switches in object
indxTrialBeforeWeightSwitch = indxMinoritySide-1;
%only use the positive values (otherwise includes if there was a weight switch)
positiveIndices = find(indxTrialBeforeWeightSwitch>0);
indxTrialBeforeWeightSwitch = indxTrialBeforeWeightSwitch(positiveIndices);
%make vectors to store the data:
    currentSeqMComValues = NaN(maxSeqReps, 1);
    MComBeforeSwitch = NaN(maxSeqReps, 1);
    currentSeqTrialNums = NaN(maxSeqReps, 1);
    trialBeforeMComSwitch = NaN(maxSeqReps, 1)
 %store the ouptut of the trials before the CoM switch
    trialBeforeSwitchVec = [trialBeforeSwitchVec, trialBeforeMComSwitch'];
    MComBeforeSwitch = [MComBeforeSwitch, currentMCOMBeforeSwitch'];

This is what I currently am looking at. All I get for all the variables listed above, except for currentMComBeforeSwitch, is NaN.

Sorry if this is not enough information, I am still in my learning stages of matlab.

Thank you!

[Walter Roberson]

.. There are no locations where indxMinoritySide-1 > 0 ?

[Catherine]

I am not sure what you are asking. When looking at the data, I can see that there are mostly positive values for minorityside-1. If you're asking if I made space for the data to go, I did do that too. Thank you!!

[Walter Roberson]

    trialBeforeSwitchVec = [trialBeforeSwitchVec, trialBeforeMComSwitch'];

We are not given any information about trialBeforeSwitchVec. But we know that trialBeforeMComSwitch was assigned on the line above according to

    trialBeforeMComSwitch = NaN(maxSeqReps, 1)

You appear to be building up trialBeforeSwitchVec incrementally, and you do not show any code in which you put any non-nan value into trialBeforeMComSwitch so it would not be surprising at all to discover that afterwards the entire trialBeforeMComSwitch is NaN.

        MComBeforeSwitch = NaN(maxSeqReps, 1);

All NaN.

       MComBeforeSwitch = [MComBeforeSwitch, currentMCOMBeforeSwitch'];

We have no information about currentMCOMBeforeSwitch but MComBeforeSwitch was assigned NaN.

If currentMCOMBeforeSwitch has even one non-NaN value then [MComBeforeSwitch, currentMCOMBeforeSwitch'] must have at least one non-NaN entry unless the [] fails.