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My histogram color is different everytime I run the program and the legend colors don't match.

Chase Viche さんによって質問されました 2019 年 10 月 8 日
最新アクティビティ Chase Viche さんによって コメントされました 2019 年 10 月 10 日
Every time I run the program my figure 7 histogram comes back with different colors and the Florida legend is correct but the Minnesota color in not. I can't figure out what is wrong with the program. I have also posted a picture of what my graphs come out like.
T = readtable('Numerical Methods EGM 3344 Speeds.xlsx');
F70 = T (1:100,1);
F65 = T (1:100,2);
F55 = T (1:100,3);
M70 = T (1:100,4);
M65 = T (1:100,5);
M55 = T (1:100,6);
figure(1);
histogram(F70.F70);
histogram(F70.F70,65:1:90)
histogram(F70.F70,'BinWidth',.5)
histogram(F70.F70, 'FaceColor', [0 0 0])
set(gca, 'XTick', 65:1:90)
title('Speeds Recorded from Florida Interstate 10 Speed Limit 70 MPH')
xlabel('Speeds Recorded')
ylabel('Amount of Each Speed')
figure(4);
histogram(M70.M70);
histogram(M70.M70,68:1:83)
histogram(M70.M70,'BinWidth',.5)
histogram(M70.M70, 'FaceColor', [1 0 0])
set(gca, 'XTick', 68:1:83)
title('Speeds Recorded from Minnesota Interstate 35 Speed Limit 70 MPH')
xlabel('Speeds Recorded')
ylabel('Amount of Each Speed')
figure(7);
histogram(F70.F70);
histogram(F70.F70, 'FaceColor', [0 0 0])
set(gca, 'XTick', 65:1:90)
hold on
histogram(M70.M70);
histogram(M70.M70, 'FaceColor', [1 0 0])
title('Comparison for the 70 MPH Speed Limit Zones')
xlabel('Speeds Recorded')
ylabel('Amount of Each Speed')
legend('Florida','Minnesota')

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1 件の回答

回答者: Chidvi Modala 2019 年 10 月 10 日

Hello Chase Viche,
From my understanding, you are trying to plot two histograms on the same figure. But histogram is coming back with different colors. It is because you are plotting each histogram twice as shown by the commented code below
figure(7);
% histogram(M70.M70);
% histogram(M70.M70, 'FaceColor', [1 0 0])
set(gca, 'XTick', 65:1:90)
hold on
% histogram(M70.M70);
% histogram(M70.M70, 'FaceColor', [1 0 0])
title('Comparison for the 70 MPH Speed Limit Zones')
xlabel('Speeds Recorded')
ylabel('Amount of Each Speed')
legend('Florida','Minnesota')
Try replacing the above code with the below one
figure(7);
histogram(F70.F70, 'FaceColor', [0 0 0])
set(gca, 'XTick', 65:1:90)
hold on
histogram(M70.M70, 'FaceColor', [1 0 0])
title('Comparison for the 70 MPH Speed Limit Zones')
xlabel('Speeds Recorded')
ylabel('Amount of Each Speed')
legend('Florida','Minnesota')

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Chase Viche 2019 年 10 月 10 日
Thank you that fixed it. In my code it was F70 first then M70. But I think what was happening is that the I was double calling for the histogram with this:
%histogram(M70.M70);
% histogram(M70.M70, 'FaceColor', [1 0 0])
When I only needed this code:
% histogram(M70.M70, 'FaceColor', [1 0 0])
Thank you again.

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