Calculating Change in 1 dimensional array

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Stephanie Goldstein
编辑： Star Strider 2014-8-22
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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采纳的回答

Star Strider
Star Strider 2014-8-22
If they are decimal values, use the diff function. Otherwise, you will have to convert them into decimal values (from degrees-minutes-seconds) first.

更多回答（2 个）

Image Analyst
Image Analyst 2014-8-22
Subtract the two latitudes you want to calculate the difference between? Or am I missing something?
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Stephanie Goldstein
Stephanie Goldstein 2014-8-22
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 2014-8-22
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
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 个评论
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Stephanie Goldstein
Stephanie Goldstein 2014-8-22
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 2014-8-22
编辑：Star Strider 2014-8-22
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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