Uning Only Interger Values

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JWalker
JWalker 2018-12-1
评论： madhan ravi 2018-12-1
I am trying to index an array based on several values, using another array(Dt). This means I need to make sure all my values in Dt being used to index are interger values so I need to remove the values that are not intergers from Dt. Is there a way to do this directly?
Alternatively as Dt is being generated by Dt = Tf/nSteps; where Tf is a constant and nSteps = 1:1:20; is there a way to insure Dt only takes the interger values of Tf/nSteps?
Any help is appreciated.
  2 个评论
KALYAN ACHARJYA
KALYAN ACHARJYA 2018-12-1
Can you explain more with array and index example?
JWalker
JWalker 2018-12-1
This is the section of code I'm working on currently, It doesn't have variable definitions but here:
for nSteps = 1:1:40
Dt = Tf/nSteps; %Makes Dt step size foe new steps
DtInt = floor(Dt); %Makes Dt Intergers
DtInt= unique(DtInt); %Makes unique intergers
T0=T; %Resets start temp of object
EulerTemp = zeros(1,nSteps);
EulerTime = zeros(1,nSteps);
EulerTemp(1) = T0;
EulerTime(1) = 0;
tstart=0;
for EulerLoop = DtInt:DtInt:Tf
DT = -K*(T0-Te)*Dt;
T0 = T0+DT;
tstart = EulerLoop;
EulerTemp(1+EulerLoop/DtInt) = T0;
EulerTime(1+EulerLoop/DtInt) = tstart;
end
PercentError = abs(EulerTemp-ExactTemp)/ExactTemp;
end

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采纳的回答

YT
YT 2018-12-1
You could use round(), floor(), ceil() to first round the floats to integers and then use unique() to remove possible duplicates
Tf = 500; %constant
nSteps = 1:1:20; %steps
Dt = Tf./nSteps
unique(round(Dt))
ans =
25 26 28 29 31 33 36 38 42 45 50 56 63 71 83 100 125 167 250 500
  2 个评论
JWalker
JWalker 2018-12-1
I literaly just realised that and finished coding that. Can I just check the code for that would be:
nSteps = 1:1:40
Dt = Tf/nSteps; %Makes Dt step size foe new steps
DtInt = floor(Dt); %Makes Dt Intergers
DtInt= unique(DtInt); %Makes unique intergers

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