How to display the indices data in command window automatically?

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Manoj 2018-7-13

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https://ww2.mathworks.cn/matlabcentral/answers/410272-how-to-display-the-indices-data-in-command-window-automatically

评论： Manoj 2018-7-16

data.xls

Find the attachment of the data contains 2 columns, 1st column is sequential increment values and 2nd one is before and after 0 data is there w.r.t the 1st column. I need to read only the indices data (say @11.2 and 13.5 )and display in command window . Along with that if I plot 1st column versus 2nd column, at that particular indices data i need to display the text with horizontal or vertical alignment and markers also. thanking you

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Answer 1

Peter Meglis 2018-7-13

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编辑：Peter Meglis 2018-7-13

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Hi Manoj,

From my interpretation it sounds like you want to get values from the second column of a table based on a condition (like the data is 13.5) from the first column, as well as plot multiple values and add markers or labels. Here is some sample code that I wrote up doing that:

table = readtable('data.xls');
table.Properties.VariableNames = {'ColA', 'ColB'};
% Indexing based on condition
value = table.ColB(table.ColA == 12.6)
% Indexing based on multiple values
rowIdx = ismember(table.ColA, [11.1 12.6 13.5]);
multipleValues = table(rowIdx, :)
xs = multipleValues.ColA;
ys = multipleValues.ColB;
plot(xs, ys, 'o')
text(xs, ys, 'Text', 'HorizontalAlignment', 'left', 'VerticalAlignment','top');
xlabel('X Axis');
ylabel('Y Axis');