How to extract a slider value?

Question

Darío Imbernón Clavero 2021-4-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/807952-how-to-extract-a-slider-value

编辑： VBBV 2024-5-18

%Slider

fig = uifigure('Position',[100 100 350 275]);

pnl1 = uipanel(fig);

sld1 = uislider(pnl1,'Position',[100 40 120 3],... 'ValueChangingFcn',@(sld,event1) slider1(event1));

sld1.Limits = [-100 100];

sld2 = uislider(pnl1,'Position',[100 100 120 3],... 'ValueChangingFcn',@(sld,event2) slider2(event2));

sld2.Limits = [-100 100];

sld3 = uislider(pnl1,'Position',[100 180 120 3],... 'ValueChangingFcn',@(sld,event3) slider3(event3));

sld3.Limits = [-100 100];

I'm trying to make a program to extract the power of my engine from the sliders I declared(each one corresponds to one engine). So I need to extract the value of each slider when i dragg it as an integer variable, if anyone can help it will be great.

Thanks!

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Answer 1

Adam Danz 2021-4-20

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https://ww2.mathworks.cn/matlabcentral/answers/807952-how-to-extract-a-slider-value#answer_680327

编辑：Adam Danz 2021-4-20

See the value property in the slider documentation.

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Darío Imbernón Clavero 2021-4-21

I put this for to read the values of the slider as you said, but it sends me this error. I dont find any information about it.

Adam Danz 2021-4-21

编辑：Adam Danz 2021-4-23

The first line of the error message tells you what the problem is.

slider3 is not defined.

You probably mean app.slider3 assuming that's the handle to your slider.

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Answer 2

VBBV 2024-5-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/807952-how-to-extract-a-slider-value#answer_1459696

编辑：VBBV 2024-5-18

在 MATLAB Online 中打开

@Darío Imbernón Clavero, You can call the ValueChangedFcn property for the uislider function, and define functions for ValueChangedFcn names given inside the uislider function. This will make the slider functions output the slider value accordingly and get rid of the for loop. The sld and event are common input arguments for the slider functions to record the events by user clicks on slider component.

clc
clear all 
fig = uifigure('Position',[100 100 350 275])
pnl1 = uipanel(fig)
sld1 = uislider(pnl1,'Position',[100 40 120 3],'ValueChangedFcn',@(sld,event) slider1(event))
sld1.Limits = [-100 100]
sld2 = uislider(pnl1,'Position',[100 100 120 3],'ValueChangedFcn',@(sld,event) slider2(event))
sld2.Limits = [-100 100]
sld3 = uislider(pnl1,'Position',[100 180 120 3],'ValueChangedFcn',@(sld,event) slider3(event))
sld3.Limits = [-100 100]
% call the ValueChangedFcn 
a = sld1.ValueChangedFcn;
b = sld2.ValueChangedFcn;
c = sld3.ValueChangedFcn;
% define the functions for ValueChangedFcn names given inside the uislider 
function a = slider1(event)
  a = event.Value  
end 
function b = slider2(event)
   b = event.Value   
end 
function c = slider3(event)
   c = event.Value    
end 