Iterating using a specific interval, to intermittently average data in a scatter plot.
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Robyn Seery
le 11 Mar 2021
Commenté : Star Strider
le 15 Mar 2021
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
le 11 Mar 2021
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.
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