Iterating using a specific interval, to intermittently average data in a scatter plot.

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Robyn Seery 2021-3-11

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https://ww2.mathworks.cn/matlabcentral/answers/769672-iterating-using-a-specific-interval-to-intermittently-average-data-in-a-scatter-plot

评论： Star Strider 2021-3-15

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