changing axis values into names

Question

Locks 2014-11-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/163810-changing-axis-values-into-names

评论： Steven Lord 2019-1-4

Hi,

I have the following Problem:

I created a variable that is either 1 or -1, depending on other factors, which are irrelevant for the Problem itself. Now I would like to plot the results using this code:

myData(:,1)=[726792 726793 726794 726796 726799 726800 726801 726802 ];
myData(:,2)=[1 1 1 -1 -1 1 1 -1];
plot (myData(:,1),myData(:,2))
axis([min(myData(:,1)) max(myData(:,1)) -2 2])
datetick('x','mmmyyyy')

That is woking fine, however instead of having -1 and 1 on the yaxis, I would like to have exactly this plot but on the y axis at the Point where now a 1 is Standing, i would like to write "contango" and at -1, I would like to write "backwardation". Is this somehow possible?

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Answer 1

Mischa Kim 2014-11-22

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https://ww2.mathworks.cn/matlabcentral/answers/163810-changing-axis-values-into-names#answer_159854

Locks, add to your code

 ax = gca;
 ax.YTick      = [-1,1];
 ax.YTickLabel = {'contango','backwardation'};

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Moslem Uddin 2019-1-4

I want to chane for just one point, all others will be the same . what to do ?

Steven Lord 2019-1-4

Create a sample plot and retrieve the handle of the axes containing it.

h = plot(1:10, 1:10);
ax = ancestor(h, 'axes');

Retrieve the Y tick labels.

yL = ax.YTickLabel;

Change the retrieved labels.

yL{3} = '-999';

Update the labels in the axes.

ax.YTickLabel = yL;

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Answer 2

Erenca 2015-12-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/163810-changing-axis-values-into-names#answer_204604

If you wish to do it using the graphical interface, follow these steps (i am using R2015b)

Plot the figure.
On the figure window choose 'Edit' dropdown menu.
On the edit dropdown menu click on 'Axes properties...'
On the newly opened window you will see 'Ticks...' button on lower right hand side, click on it
Now you can replace the axis variables with whatever you want, be it number or string

best- erenca