“plot” function for some repetitive X values

Question

KU 2011-8-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/14683-plot-function-for-some-repetitive-x-values

编辑： Deepak Sharma 2021-5-25

Hi, I would like to use “plot” function for some repetitive X values e.g: 1:10 and again 10:1 but the Y values are differ(in one curve).

I want to show effect of increasing value [1:10] and the decreasing value [10:1] in one figure.*

Could you please let me know what the solution is?

Thanks,

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Deepak Sharma 2021-5-25

编辑：Deepak Sharma 2021-5-25

I need help in below plot, my xaxis values = [0 10 20 30 40 50 60 70 80 90 80 70 60 50 40 30 20 10 0]. i want to unfold this graph so that my xaxis must follow the original trend ie 0-->90-->0.

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Answer 1

Lucas García 2011-8-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/14683-plot-function-for-some-repetitive-x-values#answer_19965

在 MATLAB Online 中打开

I am not sure if I understand correctly.. is this what you are looking for?

myTicks = 1:20;
y = rand(1,length(myTicks));
plot(myTicks,y)
set(gca, 'xTick', myTicks);
% Modifying Tick Labels in X-axis
myTicks(myTicks > 10) = 10:-1:1;
set(gca, 'xTicklabel', myTicks)

----------

Update after comment.

Let X be a matrix with two columns and the values in your comment:

plot(X(:,2))
set(gca, 'xTick', 1:size(X,1))
set(gca, 'xTicklabel','')
h = get(gca, 'XLabel');
set(h,'Units','data'); 
pos = get(h,'Position'); 
y = pos(2);
hLabels = zeros(1,size(X,1));
labels = num2str(X(:,1));
for i = 1:size(labels,1) 
  hLabels(i) = text(i,y,labels(i,:)); 
end 
set(hLabels,'Rotation',45,'HorizontalAlignment','right')

Or you can do:

plot(X(:,2))
set(gca, 'xTick', 1:size(X,1))
set(gca, 'xTicklabel', num2str(X(:,1)))

and use XTICKLABEL_ROTATE to rotate the X-labels.

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KU 2011-8-29

Thanks very good approach, but if the X values (and Y value)are as follows what is your suggestion:

Xvalue: YValue:

37.3940291 14860.75949

27.55755388 19113.92405

23.10120535 15586.49789

20.22882759 18481.01266

18.01295354 15983.12236

16.38726285 16286.91983

14.95379794 16658.22785

13.70989555 16759.49367

12.58615174 16700.42194

11.59731113 15544.3038

10.75376355 15628.69198

9.947094575 15932.48945

9.235245842 15434.59916

8.566337569 15696.20253

7.939650648 15130.80169

7.36433843 15215.18987

6.822362566 15400.84388

6.304337611 15004.21941

5.811550906 15147.67932

5.360799319 14413.50211

4.941224431 15097.04641

4.525412755 14852.32068

4.12032583 15316.4557

3.744600743 14345.99156

3.400057958 14616.03376

3.120381752 13670.88608

3.25267612 13189.87342

4.879741922 11198.31224

7.212135739 22759.49367

10.61391919 22295.35865

16.22155704 28987.34177

35.12703384 30776.37131

32.74118231 30835.44304

25.76381219 30776.37131

22.01304747 30835.44304

19.41287365 30776.37131

17.39966654 30776.37131

15.7698445 30835.44304

14.45311027 29392.40506

13.24725743 22025.31646

12.1906177 22067.51055

11.28467634 22371.30802

10.44572906 22329.11392

9.683630887 22236.28692

8.97903786 22227.8481

8.329970265 22236.28692

7.723710397 23147.67932

7.158589071 23375.52743

6.630869304 23282.70042

6.157635698 20464.13502

5.657967089 10987.34177

5.210281538 10995.78059

4.78405358 11012.65823

4.376897035 10987.34177

3.981984125 12185.65401

3.617524529 13189.87342

3.2622068 13189.87342

3.287549515 13215.18987

3.645618702 13189.87342

4.011685905 12008.43882

4.407021164 10995.78059

4.81464642 10987.34177

5.242899398 11012.65823

5.693528961 10995.78059

6.187060849 21274.2616

6.668678978 23113.92405

7.201559268 22978.90295

7.762060463 23308.01688

8.376114784 22135.0211

9.031802606 22227.8481

9.740789702 22236.28692

10.50555399 22236.28692

11.35099655 22362.8692

12.27064187 22033.75527

13.33485712 22025.31646

14.53893529 30033.75527

15.88006029 30776.37131

17.53052302 30835.44304

19.58748291 30776.37131

22.25325616 30835.44304

26.13589008 30776.37131

33.61449307 30776.37131

44.62329613 30835.44304

29.93289682 30776.37131

24.44377745 30835.44304

21.14036795 30776.37131

18.74410116 30776.37131

16.89065642 30835.44304

15.35038336 30776.37131

14.10347698 26751.05485

12.91919234 22000

11.89893523 22168.77637

11.02040371 22295.35865

10.21148914 22303.79747

9.461912276 22261.60338

8.777003187 22270.04219

8.125495634 22438.81857

7.551896981 23139.24051

6.997299342 23215.18987

6.47436806 23071.72996

Lucas García 2011-8-29

Are you sure you are typing it correctly? Copy and paste this example. It should work fine.

X = rand(10,2);

plot(X(:,2))

set(gca, 'xTick', 1:size(X,1))

set(gca, 'xTicklabel','')

h = get(gca, 'XLabel');

set(h,'Units','data');

pos = get(h,'Position');

y = pos(2);

hLabels = zeros(1,size(X,1));

labels = num2str(X(:,1));

for i = 1:size(labels,1)

hLabels(i) = text(i,y,labels(i,:));

end

set(hLabels,'Rotation',45,'HorizontalAlignment','right')

KU 2011-8-29

Thanks a lot Lucas, it works,

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Answer 2

Fangjun Jiang 2011-8-28

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/14683-plot-function-for-some-repetitive-x-values#answer_19942

在 MATLAB Online 中打开

What effect do you want? You can always split them and plot them separately.

x=1:10;
y1=2*x+10;
y2=x.^2;
x=[x x];y=[y1 y2];
plot(x,y)

If you don't like the line from x=10 to x=1, replace the last line with,

plot(x,y,'r*');

To split:

idx1=1:10;
idx2=11:20;
figure;
plot(x(idx1),y(idx1),'r',x(idx2),y(idx2),'b');

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KU 2011-8-29

Thanks for the reply, but it‘s not the proper graph for my work, actually I want to show effect of increasing value [1:10] and the decreasing value [10:1] in one figure. To this aim, the [10:1] values are located after [1:10].

I will be grateful if you give me any solution.

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