seeking help with a for loop syntax

1 view (last 30 days)
John on 18 Nov 2013
Answered: dpb on 18 Nov 2013
Hi there,
I'm trying to write a simple for loop to simulate how the state of charge of an electric vehicle battery decreases as journeys are made. I specify the following variables before the for loop:
  1. The number of journeys
  2. The initial state of charge of the battery
  3. The departure time and arrival time of each journey
I want to decrease the initial state of charge with each iteration of the for loop. The calculation is just the (arrival time - departure time)*1.5. I'm just learning matlab and I have attempted it below but it is completely wrong. I'd appreciate any help.
JN = 3; % Number of journeys
dt1=2; % departure time 1
at1=5; % arrival home time 1
dt2=8; % departure time 2
at2=11; % arrival time 2
dt3=8; % departure time 3
at3=11; % arrival time day 2
SOC0 = 100; % Initial state of charge
for i=1:JN
SOC(i) = SOC (i-1) - (at(i)-dt(i))*1.5
John on 18 Nov 2013
Thank you for your help

Sign in to comment.

Answers (1)

dpb on 18 Nov 2013
For the loop solution you've got to fix the references to start at one. One way is sotoo--
at=[5 11 11]; % arrival home times
dt=[2 8 8]; % departure times
for i=1:JN
SOC(i+1) = SOC(i) - (at(i)-dt(i))*1.5;
Then, the "Matlab way" would be to vectorize the computation and eliminate the loop...
>> at=[5 11 11]; dt=[2 8 8];
>> SOC0=100;
>> SOC=[SOC0 cumsum(SOC0-at.*dt*1.5)]
100 85 53 21


Find more on Manage Products in Help Center and File Exchange


Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!