# help with eval function - calculating multiple arrays at once

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Euan Muir on 13 Mar 2021
Answered: Walter Roberson on 13 Mar 2021
Hi, I need to calculate a seperate array for 'speedMsAWP' for each the speedMS values 1 to 12. So one the code had finished running I would have 12 unique speedMsAWP arrays that were calculated with the speedMS arrays(1 to 12). I was recommened to use the eval function to do this. Any help appreciated.
The code below is what I have so far
speedMS1 = speedMS(1:744,:);
speedMS1 = speedMS1(:);
speedMS2 = speedMS(745:1416,:);
speedMS2 = speedMS2(:);
speedMS3 = speedMS(1417:2160,:);
speedMS3 = speedMS3(:);
speedMS4 = speedMS(2161:2880,:);
speedMS4 = speedMS4(:);
speedMS5 = speedMS(2881:3624,:);
speedMS5 = speedMS5(:);
speedMS6 = speedMS(3625:4344,:);
speedMS6 = speedMS6(:);
speedMS7 = speedMS(4345:5088,:);
speedMS7 = speedMS7(:);
speedMS8 = speedMS(5089:5832,:);
speedMS8 = speedMS8(:);
speedMS9 = speedMS(5833:6552,:);
speedMS9 = speedMS9(:);
speedMS10 = speedMS(6553:7296,:);
speedMS10 = speedMS10(:);
speedMS11 = speedMS(7297:8016,:);
speedMS11 = speedMS11(:);
speedMS12 = speedMS(8017:8760,:);
speedMS12 = speedMS12(:);
a = 0.11
speedMsAWP(1 to 12) = speedMS(1 to 12) *((30/31)^a);
Walter Roberson on 13 Mar 2021

Walter Roberson on 13 Mar 2021
bounds = [1 745 1417 2161 2881 3625 4345 5809 5833 6553 7297 8017 8761];
if size(speedMS,1) > bounds(end)
bounds(end+1) = size(speedMS,1)+1;
end
speedMSCells = mat2cell(spedMS, diff(bounds), size(speedMS,2));
speedMSCells = speedMSCells(1:12); %discard anything after 8760
c = (30/31).^0.11;
speedMSAWPcells = cellfun(@(C) C(:).*c, speedMSCells, 'uniform', 0);

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