Change zeros to Nans only at a certain page in a 3D matrix

I have a 3D matrix and I`m ttrying to change the zero elements of a certain page (let`s say the third one) to a NaNs. Can someone please help me? That one liner does not work.....

>> data(:,:,3)(data(:,:,3)==0)=NaN;

Answer 1

[cht]

It should be:

a(2,2,4)=zeros;

isz=(a(:,:,3))==0;

a(isz,:,3)=nan

Still many thanks to @dbd for the help!

Answer 2

[dpb]

x(x(:,:,3)==0)=nan;

Start from inside out...above is

isZ=(x(:,:,3)==0);
x(isZ,3)=nan;

w/o the temporary indexing array.

ADDENDUM/ERRATUM: Missing trailing "3" added to original--dpb

[cht]

It does change the first, but not the third page.

a(2,2,4)=zeros;

isz=a(:,:,3)==0;

a(isz)=NaN

a(:,:,1) =

NaN NaN

NaN NaN

a(:,:,2) =

0 0

0 0

a(:,:,3) =

0 0

0 0

a(:,:,4) =

0 0

0 0

>>

[dpb]

Oops. Missed adding the 3rd dimension when made the simplification...since the operation was

isZ=(x(:,:,3)==0)

isZ is 2D logical array -- x(isZ) --> same as x(isZ,1) without explicit 3rd dimension.

As the original shows, you have to address the plane of interest, too...edit'ed the Answer to correct.

Sorry for the typo...trying to clarify just confused.... :(

[cht]

Hi,

thanks for the fast response. But still I`m not sure that this works......

a(2,2,4)=zeros;

isz=(a(:,:,3))==0;

a(isz,3)=nan

a(:,:,1) =

0 0

0 0

0 0

0 0

a(:,:,2) =

NaN 0

NaN 0

NaN 0

NaN 0

a(:,:,3) =

0 0

0 0

0 0

0 0

a(:,:,4) =

0 0

0 0

0 0

0 0