How do I specify a variable from a table that uses words and not numerical values

1 Ansicht (letzte 30 Tage)
I'm trying to use an if statement to equate to 'Na'. I'm not sure how I would write the variables out. Such as 'orange peel', 'NA', 'wrapper', etc.

Akzeptierte Antwort

Campion Loong
Campion Loong am 14 Apr. 2021
Bearbeitet: Campion Loong am 15 Apr. 2021
I would use a categorical for trashTags.
trash = readtable('Litterati_processed_data.csv');
trash.Tags = categorical(trash.Tags);
Alternatively, it's more memory efficient to directly read the Tags in as categorical (i.e. rather than converting after import). Use ImportOptions and the corresponding detectImportOptions:
% I am guessing your file layout here. Tinker to suit your needs
opts = detectImportOptions('Litterati_processed_data.csv', 'Delimiter', ',');
opts = setvartype(opts,'Tags','categorical'); % directly read "Var1" in as categorical
If your 'NA' actually means 'not applicable', you can read that in as missing value too:
opts = setvaropts(opts, 'Tags', 'TreatAsMissing', 'NA');
Now just read it in with your configured options:
trash = readtable('Litterati_processed_data.csv', opts);
% Just count the number of "NA"
n = nnz(t.Tags == 'NA')
% Or if you had treated "NA" as missing at import
n = nnz(ismissing(t.Tags))

Weitere Antworten (1)

Geoff Hayes
Geoff Hayes am 14 Apr. 2021
Elias - try using strcmp or the case-insensitive strcmpi.

Kategorien

Mehr zu Data Type Conversion finden Sie in Help Center und File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by