The loop is causing time out so i want to convert it to matrix operations.

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MSDataSpl1 2017-6-18

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https://ww2.mathworks.cn/matlabcentral/answers/345196-the-loop-is-causing-time-out-so-i-want-to-convert-it-to-matrix-operations

关闭： MATLAB Answer Bot 2021-8-20

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I ave re written my doubts so please consider it now,

for i = 2 : LenRxDiv
  UsedAnt = currAnt(i-1);
  %UsedAnt = currAnt(1:LenRxDiv);
  StartTime = currTime(i-1);
  %StartTime[1:LenRxDiv] = currTime(1:LenRxDiv);
  %check for intersection with CQI
  IntersLen = min([(ActTimeStop - StartTime) (currTime(i) - ActTimeStart) repmat((currTime(i) - StartTime),NumActReg,1) (ActTimeStop - ActTimeStart)], [], 2);
  %IntersLen[1:LenRxDiv] = min([(ActTimeStop[1:LenRxDiv] - StartTime[1:LenRxDiv]) (currTime[1:LenRxDiv] - ActTimeStart[1:LenRxDiv]) repmat((currTime[1:LenRxDiv] - StartTime[1:LenRxDiv]),NumActReg[1:LenRxDiv],1) (ActTimeStop[1:LenRxDiv] - ActTimeStart[1:LenRxDiv])], [], 2);
  UtilHSDPA(UsedAnt) = UtilHSDPA(UsedAnt) + sum(IntersLen(IntersLen>0));
  UtilAll(UsedAnt) = UtilAll(UsedAnt) +  currTime(i) - StartTime;
end

These are the values of above code:

when i = 2

LenRxDiv : 1*1 double = 725590
UsedAnt :1*1 double = 2
IntersLen : 120936 * 1 double = -5238 -88277/3 .... ..... ..... .....
StartTime :1*1 double = 2046467740
ActTimeStop : 120936 * 1 double = 2046462502 .... .... ...... .....
ActTimeStart : 12093 * 1 double = 2046462502 .... .... .... ....
CurrTime(i) : 725590 * 1 double = 20464627740 ..... .... .....
NumActReg : 1 * 1 double = 120936
UtilHSDPA(UsedAnt) : 1 * 4 double = 0 0 0 0

so now could someone please explain how can remove the loop from above code since its causing timeout and can it be converted into matrix manipulation.

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MSDataSpl1 2017-8-1

编辑：dpb 2017-8-1

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Even when i am using the change you mentioned

IntersLen=min([(ActTimeStop-StartTime) (currTime(i)-ActTimeStart) ...
             (currTime(i)-StartTime) (ActTimeStop-ActTimeStart));

then i am getting the error,

Dimensions of matrices being concatenated are not consistent.

MSDataSpl1 2017-8-1

I want to find the minimum value of the matrices so i am using min function but the problem is the dimension of matrix should be same so i am using repmat but it causing timeout when used for multiple iterations, so is there any substitut for repmat

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