Recent content by rd42

  1. R

    Accelerometer to Frequency and Amplitude

    I have a spreadsheet of Accelerometer data out of an iPhone and I have calculated the displacement in the three axis. I would like to figure out how to take this info and calculate the frequency, avg. amplitude, and the highest amplitude. Excel has a frequency function but I would like to...
  2. R

    Plot 2D Trajectory: Solve Initial Velocity & Coordinates

    I'm trying to plot out the trajectory of an object in a program that is looping through the function and spitting out the x and y coordinates, but I'm having trouble. I want to see a parabola starting at 0,0 going up and ending again at x,0. Basic question: (units aren't critical here f/s m/s...
  3. R

    Get Azimuth & Elevation from iPhone Accelerometer Data

    Oh well, thanks for your help. I wonder what a better example might be for the students.
  4. R

    Get Azimuth & Elevation from iPhone Accelerometer Data

    Excellent, I like assumptions :) and compounding error is cool too. I will definitely be making assumptions. I'm trying to model a baseball toss for some young kids studying physics. I'm not sure what other assumptions I will need, but I will assume a starting accel of zero, I will start...
  5. R

    Get Azimuth & Elevation from iPhone Accelerometer Data

    I'm not sure. You get acceleration in x,y and z over time.
  6. R

    Get Azimuth & Elevation from iPhone Accelerometer Data

    I'm almost to timid to ask, I haven't had a math class in over 10 years and even longer for physics. My apologies if I dumb down the forum a little bit. I'm grabbing accelerometer data out of the iPhone of someone doing a throwing motion. I'm not really sure if it is possible to get the...
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