How to solve this error index in position 1 exceeds array bounds?

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Nisar Ahmed
Nisar Ahmed 2022-1-26
评论： Cris LaPierre 2022-1-26
Hi,
How I can correct this error?
Index in position 1 exceeds array bounds (must not exceed 128).
Error in Create_Obs_dataL (line 60)
synth = synth(1+t0_i:nt+t0_i,:);

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Cris LaPierre
Cris LaPierre 2022-1-26
Ran in:
The error is that your indexing of rows (specifically nt+t0_i), is resulting in a number higher that the total number of rows in your matrix. Here's a simple example:
A = rand(2,1)
A = 2×1
0.8538 0.6416
% Works
A(2,1)
ans = 0.6416
% Your error
A(3,1)
Index in position 1 exceeds array bounds. Index must not exceed 2.
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Nisar Ahmed
Nisar Ahmed 2022-1-26
actuall, when my data point was nt = 260, it is working well. but as in new data points nt = 115, it started giving error
Cris LaPierre
Cris LaPierre 2022-1-26
Ran in:
nt = 115;
f0 = 50;
t0 = 2/f0;
dt = 0.001;
t0_i = floor(t0/dt)
t0_i = 40
nt+t0_i
ans = 155
Apparently your matrix has 128 rows, and you are trying to access the 155th, hence the error. Your equation does not appear to scale correctly with nt. You need to figure out what the correct value should be, and adjust your math accordingly.

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