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readtable excel decimal NaN

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Johannes Deelstra
Johannes Deelstra 5 Nov 2020
답변: Priysha LNU 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
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Johannes Deelstra
Johannes Deelstra 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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답변(1개)

Priysha LNU
Priysha LNU 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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