Plotting Various Colors & Symbols
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Hello,
I need help with the attached .mat file.
I am looking to make a series of 4 subplots for each D (Column 1) where each D is a different Symbol, and with that a different Color for each AR (Column 2). Each plot should look something similar to that of the attached Figure (Example_1).
After all the subplots I then need an additional plot at the end where I have all the data presented for 1 subplot for each D (Example_2).
Thanks in advance for the assistance.
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Adam Danz
2020-6-5
"I am looking to make a series of 4 subplots for each D"
There are only 3 unique RES.D values in your data so it's very unclear how to create 4 subplots from that.
You mention a time series. I dont' see any obvious time values in your table. It's clear the the D column defines the symbol and the AR column defines the color but you haven't described which column contains the data you're plotting.
采纳的回答
Adam Danz
2020-6-7
编辑:Adam Danz
2020-6-12
This should get you started. You can tweek it to meet your needs and leave a comment if you have any problems.
It creates 1 figure with 3x3 subplots. You can easily create 3 figures with 1x3 or 2x2 subplots if you'd like.
load('RES_20200604_1215.mat')
[dGroup, dGroupID] = findgroups(RES.D);
nGroups = numel(dGroupID);
figure()
for i = 1:nGroups
idx = dGroup==i;
subplot(nGroups,3,(i-1)*3+1)
plot(RES.Re(idx), RES.Fr_D(idx), 'o');
xlabel('Re', 'interpreter', 'none');
ylabel('Fr_D', 'interpreter', 'none');
title(sprintf('D = %.2f', dGroupID(i)));
subplot(nGroups,3,(i-1)*3+2)
plot(RES.Re(idx), RES.R_F(idx), 'd');
xlabel('Re', 'interpreter', 'none');
ylabel('R_F', 'interpreter', 'none');
title(sprintf('D = %.2f', dGroupID(i)));
subplot(nGroups,3,(i-1)*3+3)
plot(RES.V(idx), RES.R_F(idx), 's');
xlabel('V', 'interpreter', 'none');
ylabel('R_F', 'interpreter', 'none');
title(sprintf('D = %.2f', dGroupID(i)));
end
General demo: Scatter plot with different colors and symbols
This demo uses your RES table. The "D" column defines the symbols and the "AR" column defines the colors. The x and y axes are "Re" and "R_F" values respectively.
Read the comments to understand the big-picture purpose of each line/section. If there's a function you're unfamiliar with, look it up in the documentation to understand its inputs and what it's doing.
The main idea is that each row of your table is assigned a different symbol based on D and a different color based on AR. The scatter() function can specify the color of each point but it can only plot one marker type at a time. So the rows of your table are plotted in a loop in groups of marker-type.
% Group rows by D-value
[dGroup, dGroupID] = findgroups(RES.D);
% Define a bunch of symbols but you'll only use 'n' of them where n is the number of values in dGroupID.
symbs = {'o' 's' 'd' 'p' '*' '^' 'v' '<' '>'};
% Group rows by AR value
[arGroup, arGroupID] = findgroups(RES.AR);
% Define m colors where m is the number of values in arGroupID.
% I'm using the jet() colormap; see the documentation for other colormaps.
colors = jet(numel(arGroupID));
rowColors = colors(arGroup,:); %<-- color of each row
% Create figure
fig = figure();
ax = axes(fig);
hold(ax, 'on')
% Plot R_F as a function of Re
% Loop through each D group
h = gobjects(size(dGroupID));
for i = 1:numel(dGroupID)
% Match the rows that belong to the current D group
idx = dGroup == i;
% Plot all values that belong to current AR group
scatter(ax, RES.Re(idx), RES.R_F(idx), 50, rowColors(idx,:),symbs{i},'filled')
% Create "dummy markers" that will not appear in the plot but will appear in the legend
% DisplayName sets up the legend strings
h(i) = plot(nan, nan, 'k', 'Marker', symbs{i}, 'LineStyle', 'none', 'DisplayName', sprintf('D = %.1f', dGroupID(i)));
end
legend(h,'Location', 'NorthWest')
% Add colorbar, make sure the axis colormap is set to the colormap you used in the scatter plot
colormap(ax, colors)
cb = colorbar(ax);
% Set range of colormap values to AR values
caxis([min(arGroupID), max(arGroupID)])
% Label colorbar
ylabel(cb, 'AR values')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/314979/image.png)
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