replace any nan value in the table by zero
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I have a 34420x229 table I want to replace any nan value in the table by zero. how can I do so ?
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Robert Hamilton
am 16 Mai 2016
Bearbeitet: Robert Hamilton
am 16 Mai 2016
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.
2 Kommentare
Peter Perkins
am 30 Apr. 2018
In more recent versions of MATLAB, fillmissing would be the thing to use.
Azzi Abdelmalek
am 2 Mai 2016
M(isnan(M))=0
10 Kommentare
Steven Lord
am 11 Mär. 2021
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.
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