Find max/min value for each wave/period in a sine wave shaped chart

[sigoynern]

Hey folks!

I’m new here, so far so good

I have a 14 list of 29000 numbers each which I’ve made some charts from. All the charts have a sine wave-function shape but the min and max values are never the same. I want to find the average max and min value for each chart. But then I need to read the max and min value for each wave/period.
It’s possible to arrange the mouse marker at points from the chart to read the values, but is there an easier way to find max/min value for each period?

Screenshoot from one of my charts is comming asap

thanks for helping me out

 

[Wolfram]

Hi,

Try fixing your images, or posting a sample of raw data.

 

[sigoynern]

<a href="http://s1310.beta.photobucket.com/user/sigoynern/media/chart-shape_zpsa241f67c.jpg.html" target="_blank"><img src="http://i1310.photobucket.com/albums/s657/sigoynern/chart-shape_zpsa241f67c.jpg" border="0" alt="Photobucket"/></a>


A screenshoot of the chart.

 

[sigoynern]

Hey folks not alot of tips. Maybe my question was a little confusing. I'm interrested in getting the local max and min for the charts shown in the screen shot above.
All the charts are wave shaped with 30 waves per chart. I want to find the local max/min values for each wave/periode.

Example. look at the Force_Z_pers1.
It has 30 max and 30 min values. the first local min=-1100 and the max=-136.
These values can be found either by pointing the mouse arrow above the wanted position, or by scrolling down the list tracking the change of the values to find the max/min value.

But like I said, these processes are time consuming and I'm wondering if there is another way.

Hope to get some answers

 

[Gary's Student]

Do you have the raw data from which the chart was created?

 

[sigoynern]

THanks for your interest.

I have all the raw data's so its possible for me to go through all the numbers but that will take a long time

regards sigurd

 

[Gary's Student]

If you have the data, we can do a curve-fit. Once we have the parameters for the model equation (sine wave, dampened harmonic oscillator, etc.), we can directly calculate local maxima, minima, inflection points, etc.