Hi I need help with for loop

Hi I'm very new to matlab and was wondering if there was a way to code all of this within just one for loop

Answer 1

[KSSV]

This single loop is fine enough:

N = length(v_x) ; 
xpos = zeros(N-1,1) ; 
xpos(1) = 4 ; 
for i = 2:N-1
  xpos(i) = v_x(i)*(t(i)-t(i-1))+xpos(i-1) ;       
endfor

[Benedict Comerford]

HI KSSV

Thanks for your heap I tried your code but it kept coming up with an error

Error: File: untitled3.m Line: 16 Column: 52

Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for

mismatched delimiters.

[KSSV]

There is a typo error....edited the answer. There was one extra paranthesis '('

[Benedict Comerford]

Thank you so much that was a great help

Answer 2

[Akira Agata]

No need to use for-loop. How about the following way?

% Read data file
T1 = readtable('A1_input.txt');

% Postion of (x,y) at time = 0
x0 = 4;
y0 = 0;

% Calculate the position for each time step
xPos = cumtrapz(T1.time, T1.vx) + x0;
yPos = cumtrapz(T1.time, T1.vx) + y0;

[Benedict Comerford]

HI Akira

Thanks for that Sadly one of the requirements for my code is that it must be a for loop.