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MATLAB help

  1. Jul 17, 2012 #1
    Hello friends,
    I am new to MATLAB and I have been asigned a task in MATLAB to simulate basic equation..
    I have no idea how to start..
    The equation is

    Arterial pressure= Mean arterial pressure - h*7.46 (h= height)

    Can you tell me how to do please?

    thankx
     
  2. jcsd
  3. Jul 17, 2012 #2

    jedishrfu

    Staff: Mentor

    what are you trying to do? plot it?

    if so here's an example to try first:

    a=3
    b=5
    x = [ 1, 2, 3, 4, 5 ]
    y = a*x + b

    plot(x,y)

    y2=x*x
    plot(x,y2)

    ...
     
  4. Jul 17, 2012 #3
    but how can i relate this to my equation?
    yes..I have to plot it ..H is variable and Arterial pressure is output
     
  5. Jul 17, 2012 #4

    jedishrfu

    Staff: Mentor

    so h is the independent variable just like the x in my example where I set
    x = [ 1, 2, 3, 4, 5]

    there is also a way to set x via a range:
    x=1:5:0.1

    where x will vary from 1 to 5 by 0.1 increments ie x=[1.0, 1.1, 1.2, 1.3 ... 5]

    this should give you enough to solve the problem and plot your results via plot(h,ap)
     
  6. Jul 17, 2012 #5
    Thank you man ..now it is clear..

    I have one more question..

    I am trying to do same in simulink but can you tell me how to import my variable H in simulink? i mean which block shall I use?
     
  7. Jul 17, 2012 #6

    jedishrfu

    Staff: Mentor

    sorry I'm not a matlab user. I learned it once in a course on computational physics using java as an alternative to java simulations.

    Hopefully someone else will answer.

    In any event here's a link I found that may point you in the right direction:

    http://www.mathworks.com/support/tech-notes/1900/1902.html
     
  8. Jul 17, 2012 #7
    Thanks again
     
  9. Aug 10, 2012 #8
    Hi am new to MATLAB...I need to find the coordinates of a figure in a plot
    but i dont know how ...
    kindly explain
     
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