How to extract certain rows and columns with the readtable option for Excel files.

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Suppose we have an Excel file Data.xlsx. The file have certain descriptive text in the initial rows and then there is tabular data on several sheets. I would like to extract column 1 and column 3 but the useful row number starts from say, 30 and ends at 10000.
Table1=readtable('Data.xlsx', 'Sheet', 'Signal', 'Range', 'A:C');
Is there a better way to read such an Excel file? There is a lot of text in the initial rows of the Excel file. This is default way the instrument exports the data. How can we only read column A and column C whose useful rows start from 30 and end at 10000?

Answers (1)

Sindar on 24 Jan 2020
Edited: Sindar on 24 Jan 2020
Using the import tool, then generating code and clearing unnecessary details, this appears to be the way:
opts = spreadsheetImportOptions("NumVariables", 3);
% Specify sheet and range
opts.Sheet = "Signal";
opts.DataRange = "A30:C10000";
% Specify column names and types
opts.VariableNames = ["A", "Var2", "C"];
opts.SelectedVariableNames = ["A", "C"];
% Import the data
Table1 = readtable("Data.xlsx", opts);
Sharmila on 27 Feb 2023
Edited: Sharmila on 27 Feb 2023
is it possible to get the values if we dont know the number of rows or where exactly the column is present and identify the columns only with the header names

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