Add labels to dataset column that occur in a particular range.

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avantika 2013-9-4

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采纳的回答： Arthur

Hi!

I have a dataset of time and pitch as follows :(SMALL EXAMPLE)

time pitch

3.50 360.84

3.51 330.86

3.51 340.84

3.51 370.81

3.51 400.84

3.52 410.85

3.52 440.82

3.52 470.84

3.53 480.85

The dataset is 44058x2 double. I want to add labels to pitch values as follows : if pitch is in range of -50 - 50 then add a corresponding label of SM, if pitch is in range of 50-150 then add a label of RM. The pitch range is in between -1250 to 2450, and the corresponding labels should be SL,rL,RL,gL,GL,ML,ml,PL,dL,DL,nl,NL,SM,rM,RM,gM,GM,MM,mM,PM,dM,DM,nM,NM,SU, rU,RU,gU,GU,MU,mU,PU,dU,DU,nU,NU.

Can anyone please help.

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avantika 2013-9-5

Hi! can anyone please help me out on above mentioned question.

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Answer 1

Arthur 2013-9-5

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https://ww2.mathworks.cn/matlabcentral/answers/86345-add-labels-to-dataset-column-that-occur-in-a-particular-range#answer_95899

在 MATLAB Online 中打开

Something like this might work,assuming that your labels will cover the entire range. Put your labels in a cell array:

labels = {'SL,'rL','RL','gL','GL'}; %etcetera

now use histc to find the correct labels

edges      = -1250:100:2450;
[~,bins]   = histc(yourdata(:,2),edges);
yourlabels = labels(bin);

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avantika 2013-9-6

Can you also help me out with the plotting .

I would next like to plot the same data with time on x-axis and pitch on y-axis and also label each point of the graph (x,y) with corresponding notation in the third column of data-set .Also i would like to put one condition before plotting that is plot a graph from 0 -60 sec in one figure , next 61-120 sec in next figure and last 120 sec upto last sec in third figure. Write now I am using the following commands which give me a plot but I am not able to divide the data according to time into three figures.

%plot all the pitch values vs time.

ds = dataset('XLSFile', 'Deshgatcents.xlsx','sheet', 4); figure

time = ds(:,1);

pitch = ds(:,2);

l = cellstr(ds(:,3)); plot(time, pitch,'.','color','r')

text(double(time), double(pitch), l,'fontsize',6, 'color','b','horizontal','left', 'vertical','bottom');

xlabel('time');

ylabel('notation');

title('notations vs time')

Arthur 2013-9-6

在 MATLAB Online 中打开

The only thing you need to do is to find the indices of time.

idx = time >= 0 & time < 60;
plot(time(idx),pitch(idx));

Since you're going to use multiple axes here, I advice you to use axeshandles. This ensures that your data ends up in the right plot (and is faster).

hFig   = figure();
hAxes  = axes('Parent',hFig);
plot(hAxes,time(idx),pitch(idx));
xlabel(hAxes,'time');
ylabel(hAxes,'notation');
title(hAxes,'notations vs time');