Grabbing numbers from a string

I have a data set where some numbers are numbers like (124,456, 987) and others are numbers with an letter on them like (123P,232P) so when i read in [Data,Text] = xlsread(...) half my data set goes to data and the other half to text. The data variable puts NaN where the 124P type data was, how can I extract the number off the P and put it where the NaNs are?

2 Commenti

per isakson
per isakson il 23 Giu 2015
Modificato: per isakson il 23 Giu 2015
As a start, replace
[Data,Text] = xlsread(...)
by
[~,~,raw] = xlsread(___)
that makes it easier to keep track of the "cell" positions.
Then upload a sample of raw.
If the data is in a text file, it might be a good idea to bypass Excel.
matlabuser12
matlabuser12 il 23 Giu 2015
Modificato: matlabuser12 il 23 Giu 2015
It is an .xls file unfortunately. This is a snippet from the data column:
115
118
118
121
118
'126P'
132

Accedi per commentare.

 Risposta accettata

Azzi Abdelmalek
Azzi Abdelmalek il 23 Giu 2015
Modificato: Azzi Abdelmalek il 23 Giu 2015
s={115;118;118;'121';118;'126P';132}
idx=cellfun(@isstr,s)
b=s(idx)
c=regexp(b,'\d+(\.\d+)?','match')
d=cellfun(@str2double,c,'un',0)
s(idx)=d
Or
s={115;118;118;'121';118;'126P';132}
out=cellfun(@(x) str2double(regexp(num2str(x),'\d+(\.\d+)?','match')),s)

5 Commenti

This seems to work, but how do i convert teh cells to numbers?
Azzi Abdelmalek
Azzi Abdelmalek il 23 Giu 2015
Modificato: Azzi Abdelmalek il 23 Giu 2015
with the second method, they are already double
s={115;118;118;'121';118;'126P';132}
out=cellfun(@(x) str2double(regexp(num2str(x),'\d+(\.\d+)?','match')),s)
I used your first set of code and got rid of the S's. so I have an array s full of cells of numbers that i cannot convert into a regular matrix.
If you use the first code,add
out=str2double(out)
Got it to work with cel2mat following removal of the letter character. thank you

Accedi per commentare.

Più risposte (0)

Categorie

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by