Why don't my variables index properly?

MATRIX DIMENSIONS 119 X 9

for J = 260:262

%******************************** WORKS FINE ******************************

    start_string = num2str(J);
    index =     
    strmatch(start_string,tline(headerlines+1:length(tline)))+headerlines;

    if J == 260
        a = min(index)-1;                         % a = 2 -- this is correct
        n = max(index);                           % n = 23 -- this is correct
        for i = a:n
            s = s + Ra(i); 
            t = t + Rs(i);  
            u = u + RH(i);
            v = v + Rn(i);
            w = w + G(i);
            x = x + Ta(i);
            y = y + Ts(i);
            z = z + U2(i);
        end

%******************************* PROBLEM AREA *****************************

    elseif J > 260 & J <= 261
%         a = index;

        a = min(index);                          % a = 24 -- this is correct
        n = max(index);                          % n = 72 -- this is correct

        for i = a:n
%             s = s + Ra(i);            %INDEX EXCEEDS MATRIX DIMENSIONS
%             t = t + Rs(i);  
%             u = u + RH(i);
%             v = v + Rn(i);
%             w = w + G(i);
%             x = x + Ta(i);
%             y = y + Ts(i);
%             z = z + U2(i);
    else J > 261
        a = min(index);                          % a = 73 -- this is correct
        n = max(index);                          % n = 119 -- this is correct
    end
end

Answer 1

[Image Analyst]

Use &&:

elseif J > 260 && J <= 261

[Martin Matisoff]

Just changed it. Still getting "index exceeds matrix dimension" error. Driving me nuts.

[Image Analyst]

We don't have your data file or your complete code, so it's too hard for us to run the code and try to fix it.

[Martin Matisoff]

Here you go. Any help would be much appreciated.

[Image Analyst]

You forgot to attach the second csv file opened by the m-file: 'BiometDataSetTestData_2.csv'

Answer 2

[Star Strider]

This is a complete guess since I don’t know your data.

See if:

for i = 1:(n-a+1)

works. If you extracted your vectors from your original data, they would lose their original indices, so the indices would start with 1.

I’ll delete my Answer if I guessed wrong.

[Martin Matisoff]

Thank you for your patience.

I hope I'm not muddying the water.

You are correct, I am extracting the vectors from the original data, there are 119 records divided into three groups of data (day of year 260 through 262).

The first iteration works perfectly. For x = 260 (day of year), I extract the min value (a = 2) and the max value for (n = 23). Everything increments properly.

It when I advance to the second and third iterations that everything goes haywire. I checked, the min value for new "a" is 24, and the max value for new "n" is 71. When I enter the values for i = a:n only the first record values show 48 times.

This is driving me nuts.

[Star Strider]

It might be best to go back and see if the code you used to extract your data is doing it correctly.