How to extract data from a specified row number (omitting first row)
6 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi all,
I have a cell array from which I want to extract data from the rows between parts highlighted yellow in the image below (just part of the array shown).
I want to first indicate the start and end of these rows, as following:
%% find the kewords for start and end
idx_rtoe_start = find(strcmp(data_raw(:, 2), '"Right Toe"'));
idx_rtoe_end = find(strcmp(data_raw(:, 2), '"HX210.11.31.M7-LF S0021"'));
%% indices between idx_rtoe_start and idx_rtoe_end
idx = arrayfun(@(idxStart, idxEnd) idxStart:idxEnd, idx_rtoe_start, idx_rtoe_end,...
'UniformOutput', false);
However, '"HX210.11.31.M7-LF S0021"' occurs for the first time earlier in the file (before 'righ toe') and the code above (bolded part) gives the the first location it occurs. I want this to start from the second time it occurs. I cannot use another keyword as these also occur earlier in the file.
Please help
0 commentaires
Réponse acceptée
Simon Chan
le 16 Août 2021
Just get rid of the first data in the index:
idx_rtoe_end = find(strcmp(data_raw(:, 2), '"HX210.11.31.M7-LF S0021"'));
idx_rtoe_end = idx_rtoe_end(2:end);
0 commentaires
Plus de réponses (1)
Tomaszzz
le 16 Août 2021
Modifié(e) : Tomaszzz
le 16 Août 2021
2 commentaires
Simon Chan
le 16 Août 2021
Just have a quick look on your data and the length of your extracted data should be the same.
Why don't you just set the end index to be start index + (a number)
idx_rtoe_start = find(strcmp(data_raw(:, 2), '"Right Toe"'));
idx_rtoe_end = idx_rtoe_start + 17; % Just an example
Voir également
Catégories
En savoir plus sur Matrix Indexing dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!