How to remove the pairing X value when Y is NaN?

I have a series of XY pairing data where:

X [0 0.5 1 1.5 2 2.5]

Y [2 NaN 7 8 NaN NaN]

I have use this code Z=Y(isfinite(Y)) to remove the NaN in Y.

My question is how can I remove the data for X as well when the pairing Y data is NaN. It means I want to get the results in this way:

X [0 1 1.5]

Y [2 7 8]

Thanks so much~

Answer 1

[Friedrich]

Hi,

since X and Y have the same length do:

X = X(isfinite(Y))
Y = Y(isfinite(Y))

Answer 2

[Vishal Rane]

The simplest way I can think of is :

 NotNaN = ~isnan(Y);    % gives      1     0     1     1     0     0

 Y(NotNaN)              % gives      2     7     8

 X(NotNaN)              % gives      0    1.0000    1.5000

Answer 3

[Andrei Bobrov]

X =  [0 0.5 1 1.5 2 2.5];
Y =  [2 NaN 7 8 NaN NaN];

XY = [X(:),Y(:)];

out = XY(~isnan(Y),:); % your case

% the general case

out = XY(all(~isnan(XY),2),:);