Plot: index exceeds array bounds ("Index in position 1 exceeds array bounds. Index must not exceed 1.")

Question

Maik 2025-9-20，20:23

0
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https://ww2.mathworks.cn/matlabcentral/answers/2180087-plot-index-exceeds-array-bounds-index-in-position-1-exceeds-array-bounds-index-must-not-exceed-1

评论： Maik 2025-9-21，6:36

Greetings,

I have an array pexp.t (102x1, double) and an array pexp.pCO (102x3, double) which I would like to plot, but when I try plotting it using

plot(pexp.t,pexp.pCO(:,1))

I always get the error code

Index in position 1 exceeds array bounds. Index must not exceed 1.

I double checked if both arrays have the same / correct size in the Workspace aswell as using the command window (see below).

I can display both pexp.t and pexp.CO(:,1) just fine in the command window (see below), but as soon as I try plotting it, I get the aforementioned error code.

K>> pexp.t
ans =
     2
     4
     6
     8
    10
    12
    14
    
K>> pexp.pCO(:,1)
ans =
    1.0000
    0.9873
    0.9769
    0.9694
    0.9637
    0.9590
    0.9548