There is any function displacement

This array

I want find differential between the numbers then, i want find displacement

and thank u

Answer 1

[Joseph Cheng]

you can use the function diff() to perform this differential. so you'll have something like

 da = diff(a); %this will get your your [4 5 ...]

then you can perform your da./a(1:end-1)*100.

[abduall hassn]

yes brother but this da/a(1:end-1)*100. not given correct ans

[Joseph Cheng]

well then you did not explain it very well. this will give you the displacement that you asked for of each neighboring indexes, so by going diff(a) you get your first second third differential like you explained. Then you can divide by the original and multiply by the 100.

so if

da = 100*diff(a)./a(1:end-1)

is not what you are looking for please explain more

[abduall hassn]

thank u brother now is ok

[abduall hassn]

i used this data a=[1616400 1749524 23755514 160257 13653988 935134 15192144] i have done same u said bu i got problem step 1 da=diff(a) step2 da = 100*diff(a)./a(1:end-1)

da =

1.0e+003 *   this  is problem i dnt like to come because  it change the  ans 

   ans   0.0082    1.2578   -0.0993    8.4201   -0.0932    1.5246
  i want remove this 1.0e+003  because  change ans

[Image Analyst]

Try executing this line of code before you do that:

format long g;

[abduall hassn]

Brother if i have array more than one rows and columns like [ 56 78 6 88 67 77 64 93 60 70 22 34 29 45 15] How we can do it thank you and thank you

[Joseph Cheng]

da = diff(a,[],2)./a read the documentation of the function diff() to see that by performing diff(a,[],2) we perform it in the correct dimension.