How to add Mean and Median to a Histogram
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I have created a histogram from the array labelled DistanceMiles using the command histogram(DistanceMiles) . I need to find the mean and indicate it on the plot with a red "x", and find the median, and indicate that with a black "o"
3 件のコメント
Rik
2021 年 4 月 11 日
Why did you delete the question? Now the answer doesn't make sense anymore. Please restore it.
回答 (1 件)
Image Analyst
2021 年 4 月 11 日
編集済み: Image Analyst
2021 年 4 月 11 日
The original question, before @Michael Kuhlow deleted it for some reason, asked how to indicate mean and median on a graph of the histogram of some data. Mean with a red x, and median with a black o.
Michael, try this. Adapt as needed.
data = randn(100, 1) + 10;
h = histogram(data)
dataMean = mean(data(:))
dataMedian = median(data(:))
grid on;
hold on;
% Put up vertical lines there
xline(dataMean, 'Color', 'r', 'LineWidth', 2);
xline(dataMedian, 'Color', 'k', 'LineWidth', 2);
% Find bin centers
binCenters = (h.BinEdges(1:end-1) + h.BinEdges(2:end))/2;
% Put up red x on top of the bar
[~, index] = min(abs(dataMean - binCenters))
plot(binCenters(index), h.Values(index), 'rx', 'LineWidth', 3, 'MarkerSize', 20);
[~, index] = min(abs(dataMedian - binCenters))
plot(binCenters(index), h.Values(index), 'ko', 'LineWidth', 3, 'MarkerSize', 20);
2 件のコメント
Juan Sebastian
2024 年 1 月 13 日
編集済み: Juan Sebastian
2024 年 1 月 13 日
How can I estimade the mode for the histogram? I know that it is necesarry to estimate this parameters for data grouped.
Image Analyst
2024 年 1 月 13 日
@Juan Sebastian you can do
modeValue = mode(h.Values)
modeBin = h.BinEdges == modeValue
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