Help with changing text in a table
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Dear Sir/Madam,
I am fairly new to matlab and im having a problem with converting text in my table to different names. I have a table called X and under the column 'StepID' I have repeated characters of 'a to h' (8000 rows). I would like to change 'a' to 'protein A' and 'b' to 'VI' and 'c' to a different a name and so and and so forth until h. How could I implement this in Matlab.
Any help is greatly is greatly appreciated (using R2020b)
Best Regards,
Jeevs S
采纳的回答
dpb
2022-5-14
tSingh=readtable('singhData.xlsx');
catnames={'Protein A','VI','DI','AN', 'UF','CA','VRF','DF'};
tSingh.Step=categorical(tSingh.StepID,unique(tSingh.StepID),catnames);
results in
>> head(tSingh)
ans =
8×3 table
StepID M Step
______ _____ _________
{'a'} 0.00 Protein A
{'b'} 0.00 VI
{'c'} 0.00 DI
{'d'} 0.00 AN
{'e'} 0.00 UF
{'f'} 0.00 CA
{'g'} 10.00 VRF
{'h'} 5.71 DF
>>
You can, of course, replace 'StepID' in place if don't need the original any longer...
NB: the shorthand to get the valueset list instead of the constructed list...it's cleaner and is also sorted by unique()
更多回答（1 个）
It's always bestest to attach a short section of your file/variable that illustrates...but will take a stab at it from the description.
Sounds like a place for a categorical variable instead of just string substitution -- try
catnames={'Protein A','VI', ...}; % DEFINE THE display names for each category
tX.Step=categorical(cellstr(tX.Step),cellstr(['a':'h'].'),catnames);
You didn't provide the full list; you'll have to create it to match as desired...
3 个评论
gurjeevan singh
2022-5-14
编辑：gurjeevan singh
2022-5-14
That's a fignewton of the cut' n paste from the command line I didn't see...the ">>" command prompt doesn't belong in there; not sure how it did get there, but..
catnames={'Protein A','VI', ...}; % DEFINE THE display names for each category
tX.Step=categorical(cellstr(tX.Step),cellstr(['a':'h'].'),catnames);
will have a much better chance....
gurjeevan singh
2022-5-14
编辑：gurjeevan singh
2022-5-14
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