readtable excel decimal NaN

2020 11 5
1 个回答
更新时间：2020 11 11
2 次查看（30 天）

0 个投票

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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Ameer Hamza
Ameer Hamza 2020-11-5
Can you show how these values are loaded in MATLAB?
Johannes Deelstra
Johannes Deelstra 2020-11-5
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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回答（1 个）

Priysha LNU
Priysha LNU 2020-11-11

0 个投票

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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