replace any nan value in the table by zero

I have a 34420x229 table I want to replace any nan value in the table by zero. how can I do so ?

Answer 1

[Robert Hamilton]

I've spent the better part of the day looking for an answer to this, and I've finally found some success with this format (so I figured I better share):

T{:,:}(isnan(T{:,:})) = 0

If all the columns are not numeric, the above will return an error. However, can use standard MATLAB range notations, e.g. T{:,10:end}(isnan(T{:,10:end})) = 0 to just search and replace in from the 10th column to the end of the table.

I do wish that ismissing() and standardizeMissing() would allow you the choice of what you wanted to put into the table for the missing value. In my case, it is histogram data pulled from a database, and if the measuring device didn't record data in a given bin, it doesn't bother to send a 0 to save on transmission costs. So, I needed to replace all the missing data -- the NaNs -- with 0s.

[Richard Vergin]

Thanks a lot this worked perfectly!

[Peter Perkins]

In more recent versions of MATLAB, fillmissing would be the thing to use.

Answer 2

[Azzi Abdelmalek]

M(isnan(M))=0

[wesso Dadoyan]

it doesn't work. I am receiving:Undefined function 'isnan' for input arguments of type 'table'.

[Azzi Abdelmalek]

If b is your table

x=table2array(b)
x(isnan(x))=0;
b{:,:}=x

[wesso Dadoyan]

Also it doesn't work Error using table2array (line 27) Cannot concatenate the table variables 'vD' and 'vI', because their types are char and cell.

[Azzi Abdelmalek]

Can you post an example?

[wesso Dadoyan]

Dear Azzi,

What do you need exactly since the matrix is huge in size?

[Azzi Abdelmalek]

You don't need to post all your Matrix, just a sample of your data, It could be a 5x5 matrix or cell array, I don't know what you mean by table.

[Image Analyst]

"table" is a new data type that was introduced in R2013b. It's like a cell array but has a lot less overhead and memory requirements. It's limited to cases where the entire column is one data type, though different columns can be different types. Like column 1 is all double scalars, and column 2 is all strings.

[Azzi Abdelmalek]

Sometimes, it's not what they mean by table! that's why I asked to post an example

[Gabor]

Undefined function 'isnan' for input arguments of type 'table'

[Steven Lord]

That's correct, the isnan function is not defined for table arrays. I recommend using fillmissing instead, which can handle both numeric and tabular arrays.