Calculating Change in 1 dimensional array

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Stephanie Goldstein
Stephanie Goldstein am 22 Aug. 2014
Bearbeitet: Star Strider am 22 Aug. 2014
Hello! I have a 1 dimensional array of latitude values (which has dimensions of 1 X 224). How would I calculate the change in latitude, aka delta latitude?
Thank you so much!

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Star Strider
Star Strider am 22 Aug. 2014
If they are decimal values, use the diff function. Otherwise, you will have to convert them into decimal values (from degrees-minutes-seconds) first.
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Stephanie Goldstein
Stephanie Goldstein am 22 Aug. 2014
Alright, thank you!
Star Strider
Star Strider am 22 Aug. 2014
My pleasure!

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Weitere Antworten (2)

Image Analyst
Image Analyst am 22 Aug. 2014
Subtract the two latitudes you want to calculate the difference between? Or am I missing something?
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Stephanie Goldstein
Stephanie Goldstein am 22 Aug. 2014
I need to calculate the difference between all of the latitudes in the array. For instance, I need to subtract the second from the first latitude, the third from the second latitude, and so on. Does that make sense?
Image Analyst
Image Analyst am 22 Aug. 2014
That's what diff() does. Just make sure your angles are in decimal degrees or radians and not some kind of funky degrees/minutes/arcseconds form.

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Stephanie Goldstein
Stephanie Goldstein am 22 Aug. 2014
I need to calculate the difference between all of the latitudes in the array. For instance, I need to subtract the second from the first latitude, the third from the second latitude, and so on. Does that make sense?
  4 Kommentare
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Stephanie Goldstein
Stephanie Goldstein am 22 Aug. 2014
Great. Thanks. How would I apply that function (used to convert to degrees) to the entire array and not to just one cell?
Star Strider
Star Strider am 22 Aug. 2014
Bearbeitet: Star Strider am 22 Aug. 2014
According to the online documentation, the Mapping Toolbox has the dms2degrees function that does the same thing. I suggest you use it instead of the one I provided. (I don’t have the Mapping Toolbox, so just now thought to look.)

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