Plotting yyasix in Matlab from csv file

Hi

I have csv file and want to plot in matlab, I am having difficulty in plotting that file because I have two columns of data and my x-axis is constant. With one y-axis i had plot the results but the issue is with two columns.I have attached the csv file, if any body can help me that, it would be great.

Thanks

[Syed Nawaz]

The code i am using is

plotData = importdata('11.csv')

plotData.colheaders(1)

plotData.data(1)

figure(1)

clf

hold on

grid minor

plot(plotData.data(:,1),plotData.data(:,2),'*-b','LineWidth',1.2)

title('ESD event for the HBM')

set(gca,'FontSize',18);

xlabel('Time (ns)','FontSize',15,'FontWeight','bold')

ylabel('HBM Current Level (A)','FontSize',15,'FontWeight','bold')

legend({'Current waveform from a 1500V HBM pulse'})

Answer 1

[Star Strider]

Try this:

D = xlsread('pce and power at 10k for lvt.csv');

figure
yyaxis left
plot(D(:,1), D(:,2))
yyaxis right
plot(D(:,3), D(:,4))
grid
legend('Column 2', 'Column 4', 'Location','S')

EDIT —

Using plotyy:

figure
[hAx,hLine1,hLine2] = plotyy(D(:,1),D(:,2), D(:,3),D(:,4));
hLine1.LineStyle = '-.';
hLine2.LineStyle = '-.';
ylabel(hAx(1),'HBM Current Level (A)','FontSize',15,'FontWeight','bold')
ylabel(hAx(2),'Column 4 Header','FontSize',15,'FontWeight','bold')
xlabel('Time (ns)','FontSize',15,'FontWeight','bold')
legend('Current waveform from a 1500V HBM pulse', 'Location','S')
title('ESD event for the HBM')
grid minor

[Syed Nawaz]

Values on y-axis should be discrete,not like this

[Syed Nawaz]

This is for x-axis, I am talking about y-axis..

[Star Strider]

Add one of these after the plotyy call:

set(gca, 'XTick',D(:,1))                                    % X-Tick Values From File
set(gca, 'XTick',(min(D(:,1)):max(D(:,1))))                 % Uninterrupted X-Tick Values

Choose the one that does what you want. The first one uses the values for the x-axis ticks from your file (Columns 1 and 3 are the same, and there is a gap between 3 and 6). The second one creates continuous x-ticks.

Set the y-tick values similarly:

yt1 = get(hAx(1), 'YTick');
ytickLeft = round(linspace(min(yt1), max(yt1), 15),1);
set(hAx(1), 'YTick', ytickLeft)
yt2 = get(hAx(2), 'YTick');
ytickRight = round(linspace(min(yt2), max(yt2), 15),2);
set(hAx(2), 'YTick', ytickRight)

Experiment to get the result you want.

[Star Strider]

See my previous Comment.

My plotyy code now adds y-axis tick values. Experiment with the ‘ytickLeft’ and 'ytickRight’ linspace calls to get the axis results you want. (I suggest making the lengths — created by the last argument to linspace — the same value. Here, they are both 15 elements.)

Answer 2

[Adam Danz]

See my 3 comments to understand the changes I made.

plotData = importdata('pce and power at 10k for lvt.csv')
plotData.colheaders(1)
plotData.data(1)
figure(1)
clf
hold on
grid minor
yyaxis left   %added this
plot(plotData.data(:,1),plotData.data(:,2),'*-','LineWidth',1.2)   %removed color 'b'
title('ESD event for the HBM')
set(gca,'FontSize',18);
xlabel('Time (ns)','FontSize',15,'FontWeight','bold')
ylabel('HBM Current Level (A)','FontSize',15,'FontWeight','bold')
% added everything below
yyaxis right
plot(plotData.data(:,3),plotData.data(:,4),'*-','LineWidth',1.2)

% moved this down
legend({'Current waveform from a 1500V HBM pulse', 'Other thing'})

[Syed Nawaz]

I am using R2015a matlab edition.

[Adam Danz]

Syed Nawaz's comment moved here

There is error poping up and there is nothing in the graph.

Undefined function or variable 'yyaxis'.
Error in Untitled3 (line 8)
yyaxis left   %added this

[Adam Danz]

yyaxis is included in releases r2016a and later.

https://www.mathworks.com/help/matlab/ref/yyaxis.html

For earlier releases, use plotyy

https://www.mathworks.com/help/matlab/ref/plotyy.html

plotyy(plotData.data(:,1),plotData.data(:,2),plotData.data(:,3),plotData.data(:,4))

[Syed Nawaz]

I am still getting i don't know what.. My exact result unfortunately should be like the one you have plotted but I am getting this

[Adam Danz]

You should only have one call to plotyy() and no calls to plot().

Feel free to share your updated code so we can take a look at it.

[Syed Nawaz]

Thank you very much... I need to have discrete value on y-axis like the one you have plotted in above graph.. This is the result i am getting now in attached file

plotData = importdata('pce and power at 10k for lvt.csv')

plotData.colheaders(1)

plotData.data(1)

figure(1)

clf

hold on

grid minor

title('PCE and Input Power for Lvt')

set(gca,'FontSize',18);

xlabel('Input Power','FontSize',15,'FontWeight','bold')

ylabel('Avaiable Input Power','FontSize',15,'FontWeight','bold')

ylabel('PCE','FontSize',15,'FontWeight','bold')

plotyy(plotData.data(:,1),plotData.data(:,2),plotData.data(:,3),plotData.data(:,4))

legend({'PCE', 'Input Power'})

[Adam Danz]

Use the axes handles (output to plotyy) and set axis properties.

Here are a list of all axis properties and their definitions.

https://www.mathworks.com/help/matlab/ref/matlab.graphics.axis.axes-properties.html

ph = plotyy(plotData.data(:,1),plotData.data(:,2),plotData.data(:,3),plotData.data(:,4));
axis(ph, 'tight')  %set both axes as 'tight'
set(ph(1), 'yTick', -40:10:10, 'ylim', [-40 10])
set(ph(2), 'yTick', 0:.1:.8, 'ylim', [0, .8])

[Syed Nawaz]

Thanks a ton man.. you made my life much easier..

[Adam Danz]

Make sure you check out Star Strider's suggestion to use linspace() to create your ticks. I hard-coded them in my example just to quickly show how to set the axis parameters.

Answer 3

[Syed Nawaz]

There is error poping up and there is nothing in the graph.

Undefined function or variable 'yyaxis'.

Error in Untitled3 (line 8)

yyaxis left %added this