Function implementation in matlab

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Suha Ismail
Suha Ismail 2020-5-8
评论： Walter Roberson 2020-5-8
I want to implement this function ?[?, ?] = (?^( ?+?)*u[?] using 41*41 array, where u[n] =1 since all the value will be positive ,and n,m from 0 to 40,
N=40
a=0.9
x =zeros(41,41)
for k=0:N
for col = 1:41
for row = 1:41
x(row,col)=a.^(k+k)*1;
end
end
end
but id give wrong values
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Suha Ismail
Suha Ismail 2020-5-8
I chcnage to this code but still not work
Walter Roberson
Walter Roberson 2020-5-8
You do not need most of that. You only need two nested loops. Given the row number, you can immediately compute n -- it is just the row number minus 1. Given the column number, you can immediately compute m -- it is just the column number minus 1
for ...
n = row - 1;
for ...
m = col - 1;
output(row, col) = something involving n and m
end
end

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回答（1 个）

Stephen23
Stephen23 2020-5-8
>> a = 0.9;
>> V = 0:40;
>> M = a.^(V+V(:)); % requires >=R2016b
For earlier versions replace the + with bsxfun.

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