Subscript indices must either be real positive integers or logicals

hello i want to put the value of a stem plot into a single variable For eg look at the stem plot code below:

    stem(a(1).sd(20,1:2, 5,1), abs(a(2).sf(20,1:2, 5, 1)));

It plots two impulse at different time .But i want to send this plot or values in this plot to a single variable.So that whenever i plot this varibale this gives the same plot as the previos one .For eg:

    test=[];
     test(a(1).sd(irr,1:Narr, ird, isd), abs(a(2).sf(irr,1:Narr, ird, isd)));
     stem(test);

But whenver I am running this code its showing the following error:

Subscript indices must either be real positive integers or logicals

please tell me how to remove this error and plot the variable.

Answer 1

[Image Analyst]

See the FAQ for a complete and easy to understand discussion: http://matlab.wikia.com/wiki/FAQ#How_do_I_fix_the_error_.22Subscript_indices_must_either_be_real_positive_integers_or_logicals..22.3F

[Newman]

Hey I have written this new code :

x= abs(ans.A(20,1:2, 5, 1));
y=abs(ans.delay(20,1:2, 5,1));

then I have multiplied each values so received by 1000 and rounded off but then when I am writing this

test=[];
test=(y,x);

Its saying index exceeds matrix dimensions

[Image Analyst]

ans is a built in return variable. I don't think you should be using it like that.

And you can't say

text = (y,x);

that's not proper MATLAB syntax. Try changing the parentheses to brackets.