How to replace matrix elements by using statements?

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Hasancan Saral
Hasancan Saral 2022-10-3
评论： Hasancan Saral 2022-10-3
I have a matrix which has 9x9 size.(mhw1)
so i want to change the elements which higher than 3 to 3 and lower than 1 to 1.
what am i doing wrong?
c=zeros(size(mhw1));
for i = 1:size(mhw1)
if mhw1(i)>.3
c(i)=3;
elseif mhw1(i)<.1
c(i)=1;
end
end

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采纳的回答

KSSV
KSSV 2022-10-3
编辑：KSSV 2022-10-3
It is very simple and straight forward. Consider this example.
A = rand(3) ;
A(A<0.3) = 0 ;
A(A>0.8) = 1 ;

更多回答（1 个）

Ergin Sezgin
Ergin Sezgin 2022-10-3
Hello Hasancan,
You should use both rows and columns in two for loops to check and adjust each element in a 2D matrix.
for i = 1:size(mhw1,1)
for j = 1:size(mhw1,2)
if mhw1(i,j) > 3
mhw1(i,j) = 3;
elseif mhw1(i,j) < 1
mhw1(i,j) = 1;
end
end
end
You can also perform it in a quicker and more efficient way:
mhw1(mhw1>3) = 3
mhw1(mhw1<1) = 1
I hope it helps.

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