How to plot this exponential signal?

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Henri Urushihara
Henri Urushihara 2021-9-17
回答： Star Strider 2021-9-17
I keep getting an error when I try to run this section of code in Matlab for signal generation.
x=exp(-0.1*t)*sin(0.6*t);
It says "Error using *
Incorrect dimensions for matrix multiplication. Check that
the number of columns in the first matrix matches the
number of rows in the second matrix. To perform elementwise
multiplication, use '.*'."
Please help as this is for a lab. Thank you!

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回答（1 个）

Star Strider
Star Strider 2021-9-17
The error message is spot on!
Use element-wise multiplication ...
x=exp(-0.1*t)*sin(0.6*t);
↑ ← HERE
so with that correction ....
x=exp(-0.1*t).*sin(0.6*t);
it should work correctly.
See Array vs. Matrix Operations for an extended discussion.
.

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