Im trying to convolute a rect function and a sinc function

Question

Levi Stevens 2022-4-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1702920-im-trying-to-convolute-a-rect-function-and-a-sinc-function

回答： Paul 2022-4-22

Im currenlty trying to find the tip angle and to do that I have to use a formula that involves the convolution of a sinc and rect function.

clear
clc
close all
B0 = 1.5;
df = 4.258e4;
A = 2;
t = -1:1e-4:1;
N = length(t);
V = 63.87e6;
tp = 2e-3;
zbar = 0;
z = 0.1:1e-3:1;
dz = 3.33333333333333;
Gz = 3;
a = 2* pi* df* tp* A* rectangularPulse(z/dz);
b = sinc(2* pi* df* tp* Gz(z));
conv2(a,b, 'same')

Here is the Error I get

Array indices must be positive integers or logical values.
Error in hrhrhs (line 19)
b = sinc(2* pi* df* tp* Gz(z));
 

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Answer 1

Paul 2022-4-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1702920-im-trying-to-convolute-a-rect-function-and-a-sinc-function#answer_948830

Because Gz is a variable, not a function, Gz(z) is trying to use the vector z as an index into the variable Gz. But z contains elements that are neither positive integers nor logicals, hence the error.

What is Gz(z) intended to be?