CODEWITHSUNDEEP
arraysmatlabinitializationzero
gberg927
gberg927

Reputation: 1686

Initialize array without zeroes

I have an 3 dimensional array that represents an xy grid, and the z vector represents depth. I only know depths of certain rows and am trying to interpolate the array. My questions is how do I create a 720x400 array, without setting all the values to 0 (as that could affect the interpolation).

Thanks!

Upvotes: 3

Views: 10281

Answers (2)

nojka_kruva
nojka_kruva

Reputation: 1454

It is not necessary to initialize the empty rows to a special value. Instead, you can modify the interpolation procedure to assign a zero weight to these rows. Then, they will not affect the interpolation.

A simple way to do so in MATLAB would be to use the griddata method for the interpolation.

Upvotes: 2

zenpoy
zenpoy

Reputation: 20126

You can use:

A = nan(m,n,...);

to initialize a matrix with NaN's, if that is what you ask for. Other popular choices are inf(m,n,...) to initialize with Inf's and ones(m,n,...) to initialize with 1's.

So, to create a 720x400 matrix full of NaN's you can just:

A = nan(720,400);

Upvotes: 8

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