X=[4,-5,13;19,-13,21;-33,77,144]
[r,c]=size(X);
Y=zeros(length(X));
for i=1:r
for j=1:c
if X(i,j)>=0
Y(i,j)=sqrt(X(i,j));
else
Y(i,j)=X(i,j)+30;
end
end
end
Y
% Suggested & Efficient way
%Efficint Way
%Z=double(X<0).*30+X;
Try the other condition at your own, One way multiply & change X condition
#More:
%Efficint Way: You can make it more simpler or 1 line code
Z1=double(X<0).*X+30*double(X<0);
Z2=sqrt(double(X>=0).*X);
Y=Z1+Z2
