subplot axis scaling

Dear all,

I am using this code:

    %case i
    y1=0:0.001:.25;
    a1=y1;
    y1=0.251:0.001:0.5;
    a2=1/2-y1;
    y1=0.501:0.001:0.75;
    a3=-1/2+y1;
    y1=0.751:0.001:1;
    a4=1-y1;
    y1=0:0.001:1;
    a=[a1 a2 a3 a4];
    subplot(2,1,1);plot(a)
    title('case i')

As part of a multiple plot. Why is MATLAB rescaling my x-axis by multiplying through by 1000!?

Thanks, David

Answer 1

[Honglei Chen]

You didn't specify x axis, that's why the x axis becomes the indices. Just do

plot(y1,a)

Answer 2

[Thomas]

because

size(a)
ans =
          1.00       1001.00

It is not multiplying your xaxis by 1000, it is just plotting 1001 valuea of a for x going 1:1001

use plot(y1,a)