readtable excel decimal NaN

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Johannes Deelstra
Johannes Deelstra il 5 Nov 2020
Risposto: Priysha LNU il 11 Nov 2020
I use readtable to get access to excel data
some cells in the excell file contain no data and instead have a decimal point,
how can I replace these cells with NaN
regards
Johannes
  2 Commenti
Ameer Hamza
Ameer Hamza il 5 Nov 2020
Can you show how these values are loaded in MATLAB?
Johannes Deelstra
Johannes Deelstra il 5 Nov 2020
I use TT=readtable('Skutavr_tapNBTemp94-19_dag.xlsx');
then the data are entered as
'01.05.1994' 0.450000000000000 '1.03' '0.04' '11' '0' '6.6' '1.6' '0.065' '18'
'02.05.1994' 0.360000000000000 '0.59' '0.028' '7' '0.1' '7.9' '0.9' '0.046' '12'
'03.05.1994' 0.310000000000000 '0.34' '0.022' '5' '0' '7.3' '0.5' '0.035' '9'
'04.05.1994' 0.300000000000000 '0.33' '0.021' '5' '0' '9.5' '0.5' '0.034' '9'
because tfhere is a series with no data indicated as
'11.01.1996' 0.110000000000000 '0.04' '0.002' '0' '2.998' '1.1' '0.1' '0.004' '1'
'12.01.1996' 0.160000000000000 '.' '.' '.' '1.996' '0.9' '.' '.' '.'
'13.01.1996' 0.130000000000000 '.' '.' '.' '6.3' '0.9' '.' '.' '.'
'14.01.1996' 0.710000000000000 '.' '.' '.' '3.7' '0.9' '.' '.' '.'
'15.01.1996' 0.590000000000000 '.' '.' '.' '0.1' '0.9' '.' '.' '.'
'16.01.1996' 0.400000000000000 '.' '.' '.' '0' '-0.8' '.' '.' '.'
regards
Johannes

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Risposte (1)

Priysha LNU
Priysha LNU il 11 Nov 2020
Hi,
Try using the following code:
[m,n] = size(Data) %gives number of rows and columns in 'Data'
for i = 1:m
for j = 1:n
if strcmp(Data{i,j},'.') %check if cell content is "."
Data{i,j} = NaN %replace with NaN
end
end
end
DISCLAIMER: These are my own views and in no way depict those of MathWorks.

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