How do I make a smaller table by filtering a larger one?

I'm making an application that allows you to read a table from a tab delimited text file, select a row from that table, and the app displays a graph based on some data taken from that text file.

The FiberCheckTable is uploaded in a different section of the code, and the serial number (SN) is stored in column 2. The program should then show a stacked plot of the data that is stored in columns 13-16 for that specific SN. What am I doing wrong??

Here's what I have so far:

function FiberSelect(app, event)

% automatically selects serial number (SN) based on cell selected in table

indices = event.Indices;

app.SN = app.FiberCheckTable.Data{indices(1),2};

app.EvaluateCalibration(event);

end

function EvaluateCalibration(app, event)

% graph wavelength of xyz sensors in process

app.Wavelength = app.FiberCheckTable;

app.Wavelength = app.Wavelength(app.Wavelength(:,2)==app.SN,:);

app.Wavelength = sortrows(app.Wavelength,'SerialNumber','ascend');

app.WavelengthAxes = stackedplot(app.Wavelength(:,13:16));

end

Answer 1

[Image Analyst]

You might need braces instead of parentheses to get the CONTENTS of the table:

% Determine which rows to extract from the table.
rowsToExtract = app.Wavelength{:,2} == app.SN; % Should be a logical vector (1/0, true/false).
% Extract only those particular rows.
app.Wavelength = app.Wavelength(rowsToExtract, :);

[David Stewart]

Unfortunately this didn't work for me. Fortunately, one of my coworkers who knows matlab showed me my error - I was using a table object from the app, not the actual table itself. At least that's what he told me. I'm still a beginner. Thank you for your help!

[Image Analyst]

There is a UI control -- a table or uitable -- that is like a widget you place on the form. That is a different beast than a variable type called a table in MATLAB. So the widget is like a listbox or button or any other widget, while a table variable is like a double, structure, cell array, etc. type of variable. So I guess you were getting confused between the table control and the table variable -- they're different things.