MATLAB: Scalar division and Subtraction ?!!

divison

I am trying to use some artificial data to see if my code is working.. but there is a error for the division and subtraction part.. See below the Code…
function Sa = trial(lambdaMax,lambda,T)
t = 0;
I = 0;
Sa = [];
u = {10,2,11,4,5,6};
t = t - log(u)/lambdaMax;
while t < T
   u = {10,2,11,4,5,6};
  if (u <= lambda(t)/lambdaMax)
      I = I+1;
      Sa(I) = t;
  end
  u = {10,2,11,4,5,6};
  t = t - log(u)/lambdaMax;
end
lambdaMax=50;
T=20;
lambda =@(Sa) lambdaMax*cos(Sa); 
Sa = trial(lambdaMax,lambda,T);
figure
hold on
%plot(Sa,lambda(Sa),'*')
xlabel('t')
ylabel ('cos(x)')
X = linspace(min(Sa),max(Sa),10);  
Y = pchip(Sa,lambda(Sa),X);
plot(X,Y)
line(repmat(Sa,2,1),repmat([0;1],1,length(Sa)),'color','r' )
Thanks all in advance 🙂

Best Answer

Why do you use cell for your variable u? change it to be data array.
u = {10,2,11,4,5,6}
u = [10,2,11,4,5,6]
lambdaMax=50;
T=20;
lambda =@(Sa) lambdaMax*(cos(Sa)+1.1); 
Sa = trial(lambdaMax,lambda,T);
figure;
hold on;
plot(Sa,lambda(Sa),'*')
xlabel('t')
ylabel ('cos(x)')
X = linspace(min(Sa),max(Sa),100);  
Y = pchip(Sa,lambda(Sa),X);
plot(X,Y)
line(repmat(Sa,2,1),repmat([0;1],1,length(Sa)),'color','r' )
function Sa = trial(lambdaMax,lambda,T)
t = 0;
I = 0;
Sa = [];
u=rand;
t = t - log(u)/lambdaMax;
while t < T
    u=rand;
if (u <= lambda(t)/lambdaMax)
    I = I+1;
    Sa(I) = t;
end
u=rand;
t = t - log(u)/lambdaMax;
end
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