Iterating using a specific interval, to intermittently average data in a scatter plot.
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Trying to iterate through two large sets of row data (in two columns, data.x and data.y) simultaneously, with the aim of averaging the data within these intervals so I can visualise a clearer scatter plot (see original plot below). I have provided a simplified idea of what I need in code below, However, I am running into the issue of the index not being an integer.
In the code below, I am trying to return the three averages of [1,2,3], [4,5,6] and [7,8,9] in each xmeans and ymeans array.
Would appreciate any tips on the best way to do this.
% test data
x = [1;2;3;4;5;6;7;8;9];
y = [1;2;3;4;5;6;7;8;9];
% means of storage of averages at each interval
xmeans = [];
ymeans = [];
% calculate uniform interval
distance_range = length(x);
interval = distance_range/3;
s = min(x);
while (s >= min(x)) && (s <= (max(x)+1))
for k = s : (s+interval)
xmeans(s) = mean(x(k:(k+interval)-1));
ymeans(s) = mean(y(k:(k+interval)-1));
end
s = s+interval
end
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/546472/image.png)
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Star Strider
2021 年 3 月 11 日
When s >= 7 the code overwrites the array.
The indices are otherwise all integers greater than 0, so the problem with them not being integers doesn’t appear.
10 件のコメント
Star Strider
2021 年 3 月 15 日
Robyn Seery — Thank you!
Rena Berman — Thank you for helping with this!
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