How to just plot the data inside the minimum and maximum values in a figure?

Question

Zhou Ci 2023-12-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2058704-how-to-just-plot-the-data-inside-the-minimum-and-maximum-values-in-a-figure

评论： Image Analyst 2023-12-11

Hello,

I have 2 figures, From the frst figure I calculated the minimum and maximum y values from each x bin and then plotted these minimum and maximum values as dashed black line over second figure. My code:

y1 = y;
y1(isnan(z))= nan;
x1 = x(1,:);
minvalues = zeros(1,16);
maxvalues = zeros(1,16);
for k = 1:16
    x2 = x1(:,k);
    minvalues(k) = min(y1(:,k));
    maxvalues(k) = max(y1(:,k));
end
plot(ax,x1,minvalues, '--k', 'Linewidth', 2)
plot(ax,x1,maxvalues, '--k', 'Linewidth', 2)

My second figure looks like this, I just want to plot data which is inside this boundary (minimum and maximum values). Outside area should be white. How can I do this? Thank you

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Walter Roberson 2023-12-10

Do I understand correctly that you have another array, that is not x or y or z, that is being used to form the color portion of the plot? If so then are you using pcolor() or surf() or image() or imagesc() or something else to display that array at present?

Zhou Ci 2023-12-11

在 MATLAB Online 中打开

Yes exactly I am using pcolor, here is my complete code:

nBin = 100;
Bin1 = logspace(-1, 2, nBin+1);
Bin2 = logspace(-1, 2, nBin+1);
[x, y] = meshgrid(Bin1, Bin2);
z_contour = Model1(x, y);  %Contours are not displayed here
z_color = Model2(z_contour, x, y);
fig = figure;
set(fig, 'defaultFigureRenderer', 'painters')
set(fig, 'unit', 'centimeters', 'position', [50 10 13 11]);
ratio = fig.Position(3)/fig.Position(4);
axPos = [0.1 0.1 0.7 0.7*ratio];
ax = axes(fig, 'Position', axPos);
pc = pcolor(ax, x, y, z_color);
pc.EdgeColor = 'none';
ax.CLim = [-30 -15];
colormap(jet);
ax.XLim = [0.1 100];
ax.YLim = [0.1 1000];
plot(ax,x1,minvalues, '--k', 'Linewidth', 2)  %I got Minimum and Maximum values from the lines of code I posted in my question
plot(ax,x1,maxvalues, '--k', 'Linewidth', 2)

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Answer 1

Image Analyst 2023-12-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2058704-how-to-just-plot-the-data-inside-the-minimum-and-maximum-values-in-a-figure#answer_1368869

Not sure what you mean but you can use xlim and ylim to set the ranges that are visible inside the plot box.

Regarding making some part of the graph white, we're also not sure how you're getting that colored gradient background. Are you plotting to a graph, or over (on top of) a digital image?

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

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Zhou Ci 2023-12-11

在 MATLAB Online 中打开

I used pcolor

nBin = 100;
Bin1 = logspace(-1, 2, nBin+1);
Bin2 = logspace(-1, 2, nBin+1);
[x, y] = meshgrid(Bin1, Bin2);
z_contour = Model1(x, y);  %Contours are not displayed here
z_color = Model2(z_contour, x, y);
fig = figure;
set(fig, 'defaultFigureRenderer', 'painters')
set(fig, 'unit', 'centimeters', 'position', [50 10 13 11]);
ratio = fig.Position(3)/fig.Position(4);
axPos = [0.1 0.1 0.7 0.7*ratio];
ax = axes(fig, 'Position', axPos);
pc = pcolor(ax, x, y, z_color);
pc.EdgeColor = 'none';
ax.CLim = [-30 -15];
colormap(jet);
ax.XLim = [0.1 100];
ax.YLim = [0.1 1000];
plot(ax,x1,minvalues, '--k', 'Linewidth', 2)  %I got Minimum and Maximum values from the lines of code I posted in my question
plot(ax,x1,maxvalues, '--k', 'Linewidth', 2)

'I still don't know why you think you're having stuff outside the boundary plotted'

For my second figure I just want the area inside black dashed lines, not outside one. If you look at the black dashed lines pattern and data plotted in figure 1 you will see it's same. For the second figure I applied linear regression to predict some variables and then plotted it. this color here represents Temperature

Zhou Ci 2023-12-11

Model1 and Model2 are 2 equations used to predict Temperature and radius using linear regression model.

Image Analyst 2023-12-11

在 MATLAB Online 中打开

nBin = 100;
Bin1 = logspace(-1, 2, nBin+1);
Bin2 = logspace(-1, 2, nBin+1);
[x, y] = meshgrid(Bin1, Bin2);
z_contour = Model1(x, y);  %Contours are not displayed here
Unrecognized function or variable 'Model1'.
z_color = Model2(z_contour, x, y);
fig = figure;
set(fig, 'defaultFigureRenderer', 'painters')
set(fig, 'unit', 'centimeters', 'position', [50 10 13 11]);
ratio = fig.Position(3)/fig.Position(4);
axPos = [0.1 0.1 0.7 0.7*ratio];
ax = axes(fig, 'Position', axPos);
pc = pcolor(ax, x, y, z_color);
pc.EdgeColor = 'none';
ax.CLim = [-30 -15];
colormap(jet);
ax.XLim = [0.1 100];
ax.YLim = [0.1 1000];
plot(ax,x1,minvalues, '--k', 'Linewidth', 2)  %I got Minimum and Maximum values from the lines of code I posted in my question
plot(ax,x1,maxvalues, '--k', 'Linewidth', 2)