How to change the colour or text or delete some text of the default graph in findpeaks function?

How to change the colour or text or delete some text of the default graph in findpeaks function?

In this code below from matlab link https://ch.mathworks.com/help/signal/ref/findpeaks.html

It used "findpeaks"

% generate data

x = linspace(0,1,1000);

base = 4*cos(2*pi*x);

Pos = [1 2 3 5 7 8]/10;
Hgt = [3 7 5 5 4 5];
Wdt = [1 3 3 4 2 3]/100;

for n = 1:length(Pos)
    Gauss(n,:) =  Hgt(n)*exp(-((x - Pos(n))/Wdt(n)).^2);
end

PeakSig = sum(Gauss)+base;

% findpeaks function
findpeaks(PeakSig,x,'MinPeakProminence',4,'Annotate','extents')
    

[darova]

Try

h1 = get(gca,'children');
get(h1(1))

[Matlaber]

Thanks. I able to see:

However, I can I like delete/edit or change some of the displayname?

AlignVertexCenters: 'off'
            Annotation: [1×1 matlab.graphics.eventdata.Annotation]
          BeingDeleted: 'off'
            BusyAction: 'queue'
         ButtonDownFcn: ''
              Children: [0×0 GraphicsPlaceholder]
              Clipping: 'on'
                 Color: [0.9290 0.6940 0.1250]
             CreateFcn: ''
             DeleteFcn: ''
           DisplayName: 'width (half-prominence)'
      HandleVisibility: 'on'
               HitTest: 'on'
         Interruptible: 'on'
              LineJoin: 'round'
             LineStyle: '-'
             LineWidth: 0.5000
                Marker: 'none'
       MarkerEdgeColor: 'auto'
       MarkerFaceColor: 'none'
         MarkerIndices: [1 2 3 4 5 6]
            MarkerSize: 6
                Parent: [1×1 Axes]
         PickableParts: 'visible'
              Selected: 'off'
    SelectionHighlight: 'on'
                   Tag: 'HalfProminenceWidth'
                  Type: 'line'
         UIContextMenu: [0×0 GraphicsPlaceholder]
              UserData: []
               Visible: 'on'
                 XData: [0.1759 0.2190 NaN 0.4687 0.5313 NaN]
                 YData: [5.4652 5.4652 NaN -1.2093 -1.2093 NaN]
                 ZData: [1×0 double]

[darova]

try set

set(h1(1),'displayname','new_string')

[Matlaber]

I got your meaning. Thanks.

It only able to change the 4th lable which is width (half-prominence).

How about change the colour?

[darova]

[Matlaber]

Noted. But how to change the colour of

Color: [0.9290 0.6940 0.1250]

[darova]

with set function?

[Matlaber]

I tried help set but could not find how to change the colour

[Matlaber]

Do you have any ideas how to change the colour of the line?

Answer 1

[Muhammad Usama Sharaf SAAFI]

use

    title('');

command to change text after findpeak() function,

use

whitebg('blue');

to change color.

[Matlaber]

Sorry, is not changing the title of graph.

I mean changing the "box display" (As i circle in red colour).

i think is change inside the function findpeaks.m

[Muhammad Usama Sharaf SAAFI]

I got your point. just use

legend('abc');

after findpeak() function it will work.

Thanks

[Matlaber]

thanks. But it only have shown abc and deleted others

[Muhammad Usama Sharaf SAAFI]

legend('abc','xyz','123');

replace "abc" "xyz" "123" with your msg.

[Matlaber]

Brillant! It works. How about change the colour?

[Muhammad Usama Sharaf SAAFI]

Use '--b' parameter in findpeak(....,'--b') function. You can use '--r' for red color

[Matlaber]

Not sure what I am doing is correct.

>> findpeaks(PeakSig,x,'MinPeakProminence',4,'Annotate','extents','--b')
Error using findpeaks>parse_inputs (line 288)
No value was given for '--b'. Name-value pair arguments require a
name followed by a value.

Error in findpeaks (line 136)
  = parse_inputs(isInMATLAB,Yin,varargin{:});
 

[Muhammad Usama Sharaf SAAFI]

findpeaks(PeakSig,x,'MinPeakProminence',4,'Annotate','extents');
legend({'xyz','abc'},'FontSize',12,'TextColor','green');

use this command it will works perfect for you.

Thanks

[Matlaber]

Thanks for your reply.

I would like to change the colour of the line, and not the colour of the text color as shown below in circle.