I made a Heat map. I want to remove the x and y axis ticks. How is that possible?

I tried using set(gca............), but that is for plot. i am stuck at this.

[Walter Roberson]

Is this the heatmap from the Bioinformations toolbox? https://www.mathworks.com/help/bioinfo/ref/heatmap.html

Or is it the new (R2017a) heatmap() that is for table objects?

[Sattik Basu]

It is the new (R2017a) heatmap().

Answer 1

[Walter Roberson]

There are no x and y axis ticks for the new R2017a heatmap object. There is at most the ticks inside the colorbar beside the drawing. Is it the colorbar tick marks that you want to remove?

[Sattik Basu]

I attached the image showing the data in each grid, as well as the node numbers. Those are the ones, i am trying to hide.

[Sattik Basu]

The colorbar is fine. its just the map that i want without any data, just colors.

[Walter Roberson]

In my investigations, I was able to get rid of the node numbers (x and y tick labels), but it looks to me as if it is not possible to remove the text.

[Image Analyst]

Can't you use imshow?

[Sattik Basu]

Image Analyst, i used imshow, but not the image is too small. any way to enlarge the image, without compromising its quality?

[Sattik Basu]

Walter, how did you get rid of the node numbers?

[Walter Roberson]

image() or imagesc() instead of imshow() if you have small images.

[Walter Roberson]

Taking the example from the heatmap() documentation,

load patients
tbl = table(LastName,Age,Gender,SelfAssessedHealthStatus,...
    Smoker,Weight,Location);
h = heatmap(tbl,'Smoker','SelfAssessedHealthStatus');

then

%using struct in this way will produce warnings so we disable the warning
old_warning_state = warning('off', 'MATLAB:structOnObject');
hs = struct(h);
warning(old_warning_state);

%now we can get at the private properties XAxis and YAxis
hs.XAxis.TickValues = [];
hs.YAxis.TickValues = [];

[Image Analyst]

Imshow has an 'InitialMagnification' setting.

[FWDekker]

Thanks, Walter! Just a quick note: Calling xlabel or ylabel after doing this may bring back the ticks. Took me a while to figure out why your snippet didn't seem to be working.

Answer 2

[Jesús Bernardino Velázquez Fernández]

h=heatmap(x,y,c);
s=struct(h);
s.XAxis.Visible='off';
s.YAxis.Visible='off';

[Walter Roberson]

Demonstration:

load patients
tbl = table(LastName,Age,Gender,SelfAssessedHealthStatus,...
    Smoker,Weight,Location);
h = heatmap(tbl,'Smoker','SelfAssessedHealthStatus');

s=struct(h);

Warning: Calling STRUCT on an object prevents the object from hiding its implementation details and should thus be avoided. Use DISP or DISPLAY to see the visible public details of an object. See 'help struct' for more information.

s.XAxis.Visible='off';
s.YAxis.Visible='off';

[Walter Roberson]

Note this removes the x and y axes labels as well as the ticks.

The original poster had hoped https://www.mathworks.com/matlabcentral/answers/355809-i-made-a-heat-map-i-want-to-remove-the-x-and-y-axis-ticks-how-is-that-possible#comment_483043 to get rid of the numbers as well, just showing the colors.

[Din]

Is there a way to remove x and y axes label and replace them our own labels?

[Walter Roberson]

@Din

load patients
tbl = table(LastName,Age,Gender,SelfAssessedHealthStatus,...
    Smoker,Weight,Location);
h = heatmap(tbl,'Smoker','SelfAssessedHealthStatus');
h.XLabel = 'cats';
h.YLabel = 'dogs';

[Din]

Thank you for your reply. But actually my question was to

(i) remove the [Excellent, Fair, Good, Poor] and [false, true],

(ii) replace them with markings which have different dimensions (my data has [1:51] and [1:6]. I want to replace them with [90, 80, 70, ...,20, 10, 0] and [1,2,4,8,16,32]).

(iii) keep "dogs" and "cats".

[Walter Roberson]

load patients
tbl = table(LastName,Age,Gender,SelfAssessedHealthStatus,...
    Smoker,Weight,Location);
h = heatmap(tbl,'Smoker','SelfAssessedHealthStatus');

h.XLabel = 'cats';
h.YLabel = 'dogs';

%using struct in this way will produce warnings so we disable the warning
old_warning_state = warning('off', 'MATLAB:structOnObject');
hs = struct(h);
warning(old_warning_state);
hs.Axes.XTickLabels = cellstr(string([1 2])).';
hs.Axes.YTickLabels = cellstr(string([90 80 70 60])).';

[Din]

Thank you a lot. Sorry I saw your reply late.

[Din]

I just realized that what I was looking for is slightly different. Can the axes have different number of values. For example, can the Y axis have [100, 80, 60, 40, 20, 0]; that is, six values instead of four?

[Din]

I actually want a Y axis to have fewer number of values than the number of rows of the data. Plz lemme know if there is a way to do this?

[Din]

Also, when I save the figure, the original numbering (matching the dimensions of the data) overwrites the alternate numbering. Though, this problem can be solved by taking a screenshot of the figure, instead of saving it.

Answer 3

[Image Analyst]

How about

axis off;

[Sattik Basu]

i tried this too. but i am getting the following error.

Error using axis (line 63) Using axis with heatmap is not supported.