MATLAB: Indexing of a table.

MATLAB

I have a table called "diagramoptions". This table has 2 columns. With the name Key and Value. For example i want to know the value from number_of_plots. How can i get the number 4? See attachment Picture

My idea: I search the row index of the variable number_of_plots. -> then i try to get the right cell -> (row_index,2) the number 2 is the second column in my table. The return value should be 4.

I tried a lot without any results:

test_value2 = diagramoptions(3,1)% I know it works but it is hardcoded
test_value3 = diagramoptions(:,{'Key'})

thank you

Best Answer

colorval = diagramoptions{3,2}

Your table will be a cell of size 8x2, to pick number of plots you have to give index (3,2) as it's value falls in the index.

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MATLAB: How to find specific values in a table, and create an array from rows containing those values

Here is my go at it.

% Create my table so you know what I am testing with.
names = {'ssrp' , 'ssrp','tghh'}';
values = [123, 954, 1324]';
myTab = table(values,names,'VariableNames',{'values','names'});
nameList = unique(myTab.names); % Get all the unique labels
for n = 1:length(nameList)
    Eventtimes{n} = tab.values(strcmp(tab.names,nameList{n})); 
end

This results in 1 variable with a different matrix in each cell corresponding to the different events. Let me know if you need it in a different format and want help with it. May be hard to convert to a table since I believe columns need to be the same size.

MATLAB: Read values from a variable

wsectionstart = str2double(diagramoptions.Value(strcmp(diagramoptions.Key, 'wsectionstart')));

should solve the problem?

Best Answer

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MATLAB: How to find specific values in a table, and create an array from rows containing those values

MATLAB: Read values from a variable

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