Slider which controls a bar plot

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Karl Philip Hahne
评论： Karl Philip Hahne 2021-3-8
Hello everyone,
i would like to get a slider which controls a bar plot.
so i got this, but instead of the gauge i would like to have a bar plot which is changing while i move the slider.
at the end i need 4 - 5 different bars which are chancing individually depending on different functions. and there is a same variable which is in each functions and this should be the input from the slider.
function sliderchanging
% Create figure window and components
fig = uifigure('Position',[100 100 350 275]);
cg = uigauge(fig,'Position',[100 100 120 120]);
cg.MajorTicks = [0:10:100];
cg.MajorTickLabels = {'0','10','20','30','40','50','60','70','80','90','100'};
sld = uislider(fig,...
'Position',[100 75 120 3],'ValueChangingFcn',@(sld,event) sliderMoving(event,cg));
end
% Create ValueChangingFcn callback
function sliderMoving(event,cg)
cg.Value = event.Value;
end
  2 个评论
Adam Danz
Adam Danz 2021-2-7
Could you elaborate on the goal? I don't understand how the slider should affect the bar plot.
Karl Philip Hahne
Karl Philip Hahne 2021-2-8
The slider should affect the bar graphs. For example, I move the slider from 0 to 50 and the bar goes up from 0 to 50.
The goal is to visaulize costs. I fly with an airplane a detour of 50km,100km,200km (values of the slider) and thereby additional costs arise by higher kerosene consumption, personnel costs, CO2 costs etc.(these should become the bars) I move the slider to 50 km detour, thereby the following costs arise

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采纳的回答

Adam Danz
Adam Danz 2021-2-8
编辑：Adam Danz 2021-3-7
Here's a demo. The key is to set bh (the bar handle) and initialValues (the initial y-values of the bars) prior to setting the slider callback function.
uif = uifigure();
uax = uiaxes(uif,'Position', [20 100 500 300]);
initialValues = [50 100 150];
bh = bar(uax, initialValues);
grid(uax, 'on')
uis = uislider(uif,'Position',[50 50 150 3],'Value',0, 'Limits', [0,500], 'MajorTicks', 0:100:500, 'MinorTicks', []);
uis.ValueChangedFcn = @(h,~)set(bh, 'YData', initialValues + h.Value);
  6 个评论
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Adam Danz
Adam Danz 2021-3-7
编辑：Adam Danz 2021-3-7
Two problems with the callback function.
1) you need to pass the bar handle into the function.
2) the bigger problem is that you're still just adding a constant to all bar heights. You need to apply the a/b/c equations to the ydata.
It's not entirely clear how the original y values are supposed to be used in the conversions. Consider this snippet below a sketch to work from.
bh = bar(___);
uis.ValueChangedFcn = {@updateBarsFcn, bh};
function updateBarsFcn(h,~,bh)
% h is the slider handle, h.Value is the current slide value
% bh: bar handle, 1x3
y = zeros(size(bh.YData));
y(1) = 100 * (h.Value/100) * 10;
y(2) = (2*100+4*200) * h.Value;
y(3) = 0.5 * h.Value;
set(bh, 'YData', y)
end
Karl Philip Hahne
Karl Philip Hahne 2021-3-8
this is really good. i think i can work with this. Thanks first!

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更多回答（1 个）

Mario Malic
Mario Malic 2021-2-5
编辑：Mario Malic 2021-2-5
  3 个评论
显示 1更早的评论
Mario Malic
Mario Malic 2021-2-8
Just a note from the heatmap solution to get you started. Heatmap chart requires a figure or uifigure to plot, whereas bar chart requires axes or uiaxes to plot.
See the documentation for bar and do the first example to start with.
Since this is a homework task, show us what have you done so far so we can help you with it.
Karl Philip Hahne
Karl Philip Hahne 2021-2-8
so this is what i have till now.
i have the figure, axes und the slider in the same window but how do i get the bar chart in the same window as well? do i need something like bar(x, fig)??
fig = uifigure;
ax = uiaxes(fig);
x = [1 2 3 4 5]
b=bar(x)
sld = uislider(fig)

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