copy corresponding values of 2nd metrics depend on 1st metrics values

I have a two metrics in similer size lets say X and Y. I want to check the values in X and it it satisfind the requirement I want to copy coresponding Y element to separate metricxs Z, Z2, Z3

what i did is some thing like this

Z=[]

ii=0

Z2=[]

iii=0

Z3=[]

iiii=0

[RawX, ColX]= size(X)

j=1:RawX;

for n=1:ColX

if 100< X(j)<=300

ii=ii+1

Z(ii)=Y(j);

elseif if 300< X(j)<=400

iii=iii+1

Z2(iii)=Y(j);

else 400<X(j)<=500

iiii=iiii+1

Z3(iiii)=Y(j)

end

end

but im geting error

Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.

can you please help me

Answer 1

[VBBV]

Z=[];
ii=0

ii = 0

Z2=[];
iii=0;
Z3=[];
iiii=0;
X = rand(10)

X = 10×10

0.9550 0.0528 0.3988 0.4975 0.7866 0.9424 0.2501 0.1528 0.6154 0.5278 0.8411 0.4808 0.4519 0.0127 0.6746 0.9043 0.7531 0.2694 0.6852 0.1152 0.6055 0.2063 0.3776 0.3398 0.3013 0.1026 0.3232 0.1187 0.1144 0.3154 0.6749 0.4006 0.3833 0.5210 0.2074 0.6915 0.4091 0.9405 0.9099 0.2460 0.5347 0.6288 0.1128 0.8486 0.9665 0.7050 0.3994 0.2600 0.4173 0.0007 0.6950 0.4900 0.9118 0.0861 0.6187 0.0779 0.4888 0.9111 0.6740 0.8997 0.9076 0.0074 0.0239 0.4018 0.2651 0.9420 0.6340 0.2600 0.7264 0.4563 0.6546 0.9304 0.7353 0.6589 0.3517 0.2979 0.9512 0.8805 0.3336 0.9582 0.9904 0.7073 0.0651 0.7886 0.2412 0.1601 0.0626 0.3314 0.7760 0.3133 0.7171 0.5072 0.8630 0.0368 0.7734 0.3215 0.8643 0.3409 0.2823 0.7226

Y = rand(10)

Y = 10×10

0.1704 0.8017 0.0205 0.4158 0.7554 0.3214 0.8027 0.3020 0.9977 0.4332 0.2569 0.3404 0.2607 0.0886 0.7803 0.3954 0.0559 0.2862 0.6263 0.7057 0.8485 0.2298 0.1175 0.9574 0.8146 0.4981 0.4196 0.4720 0.8239 0.9954 0.8642 0.3274 0.0782 0.7858 0.9190 0.6252 0.6087 0.4671 0.3124 0.4045 0.8691 0.1809 0.5842 0.2886 0.2138 0.5709 0.7740 0.4126 0.0743 0.2323 0.1690 0.2461 0.1627 0.2844 0.3157 0.7184 0.6950 0.2450 0.9863 0.9395 0.7306 0.1196 0.3231 0.3055 0.7063 0.9774 0.9120 0.3559 0.0500 0.3417 0.1630 0.9525 0.5878 0.0733 0.9825 0.0536 0.9909 0.4954 0.6741 0.2727 0.2753 0.8191 0.0867 0.6823 0.1238 0.4268 0.0039 0.0932 0.6092 0.1667 0.9370 0.7577 0.1246 0.1005 0.9175 0.8412 0.6232 0.8542 0.5723 0.1105

[RawX, ColX]= size(X)

RawX = 10

ColX = 10

for j=1:RawX;
    for n=1:ColX
        if 100< X(j,n)<=300
        ii=ii+1;
        Z(ii)=Y(j,n);
        elseif 300< X(j,n)<=400
        iii=iii+1;
        Z2(iii)=Y(j,n);
        else 400<X(j,n)<=500
        iiii=iiii+1;
        Z3(iiii)=Y(j,n);
        end     
    end 
end