How to plot data with two different X- axis in a single plot?

Question

Vishnuvardhan Naidu Tanga 2021-9-21

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1457894-how-to-plot-data-with-two-different-x-axis-in-a-single-plot

评论： Star Strider 2021-9-23

Atq100_2.xlsx

Hello all,

I am trying to plot a data of multiple plots in a single graph. I am facing a problem in plotting it. I need the data from different Y axis in a single axis bar i.e, im my case it is from -200:200. And for X axis I need a scale for each and every X axis data as the data varies for every Y axis data. Along with that I need to plot the data with an offset at different location and i also need the offset distance as a scale either on top or on bottom X axis. I have tried plotting it but I am unable to retrive the desired result. Can someone please help me. My code is:

Z = readtable('Atq100_2.xlsx') ;

data = table2array(Z) ;

plot(data(:,2)+10, data(:,1),'linewidth', 2);

hold on

plot(data(:,4)+250, data(:,3),'linewidth', 2);

hold on

plot(data(:,6)+500, data(:,5),'linewidth', 2);

hold on

plot(data(:,8)+1000, data(:,7),'linewidth', 2);

hold on

plot(data(:,10)+1500, data(:,9),'linewidth', 2);

hold off

legend('x=10mm', 'x=250mm', 'x=500mm', 'x=1000mm', 'x=1500mm', 'Location', 'northeastoutside');

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Answer 1

Star Strider 2021-9-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1457894-how-to-plot-data-with-two-different-x-axis-in-a-single-plot#answer_792214

在 MATLAB Online 中打开

One option is to use the subplot function in a loop —

Z = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/745434/Atq100_2.xlsx') ;

data = table2array(Z) ;

plot(data(:,2)+10, data(:,1),'linewidth', 2);

hold on

plot(data(:,4)+250, data(:,3),'linewidth', 2);

hold on

plot(data(:,6)+500, data(:,5),'linewidth', 2);

hold on

plot(data(:,8)+1000, data(:,7),'linewidth', 2);

hold on

plot(data(:,10)+1500, data(:,9),'linewidth', 2);

hold off

legend('x=10mm', 'x=250mm', 'x=500mm', 'x=1000mm', 'x=1500mm', 'Location', 'northeastoutside');

N = size(data,2);

Nsp = N/2;

ttlc = {'x=10mm', 'x=250mm', 'x=500mm', 'x=1000mm', 'x=1500mm'};

figure

for k = 1:Nsp

subplot(1,Nsp,k)

col = [2 1]+2*(k-1);

plot(data(:,col(1)), data(:,col(2)), 'LineWidth',2)

grid

title(ttlc{k})

ylim([-1 1]*200)

end

I am not certain what the desired result is.

.

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Star Strider 2021-9-22

在 MATLAB Online 中打开

My pleasure!

The plot can become uncomplicated and difficult to interpret. I introduced an amplification factor ‘famp’ (since I could not think of anything else to call it) that expands the ‘x’ range of each series. (I would not increase that beyond the current value of 2 for obvious reasons.) The new ‘catacol1’ variable incorporates it, and substitutes for the first argument to plot. The rest of the code uses it as well.

Z = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/745434/Atq100_2.xlsx') ;

data = table2array(Z) ;

N = size(data,2);

Nsp = N/2;

ttlc = {'x=10mm', 'x=250mm', 'x=500mm', 'x=1000mm', 'x=1500mm'};

xofst = [10 250 500 1000 1500];

figure

ylim([-1 1]*200)

xlim([0 1600])

hold on

for k = 1:Nsp

col = [2 1]+2*(k-1);

famp = 5; % Amplification Factor

datacol1 = data(:,col(1))*famp+xofst(k);

hp(k) = plot(datacol1, data(:,col(2)), 'LineWidth',2);

% plot(data(:,col(1))+xofst(k), data(:,col(2)), 'LineWidth',2)

% minx = min(data(:,col(1))+xofst(k));

% maxx = max(data(:,col(1))+xofst(k));

minx = min(datacol1);

maxx = max(datacol1);

plot([1;1]*[minx maxx], ([1;1]*ylim).', ':k', 'LineWidth',1) % Plot Vertical 'scale' Lines

end

hold off

hl = legend([hp], ttlc, 'Location','northoutside', 'Orientation','horiz', 'NumColumns',2);

% lgdpos = hl.Position

% hl.Position = lgdpos+[0.134 0 0 0];

ht = title('Velocity Profile At Q = 100');

ttlpos = ht.Position;

ht.Position = ttlpos+[0 100 0];

xticks(xofst) % Optional

Repositioning the legend (and adjusting the title position) also improves the horizongal separation. I also added the sticks call to make the plot a bit easier to interpret. Use those changes if you want them.

.

Vishnuvardhan Naidu Tanga 2021-9-23