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

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Zhou Ci
Zhou Ci 2023-12-10
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
  2 个评论
Walter Roberson
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
Zhou Ci 2023-12-11
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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回答（1 个）

Image Analyst
Image Analyst 2023-12-10
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
Zhou Ci 2023-12-11
Model1 and Model2 are 2 equations used to predict Temperature and radius using linear regression model.
Image Analyst
Image Analyst 2023-12-11
Ran in:
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)
How are YOU getting past that point?

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