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array summation [message #93441] Tue, 19 July 2016 06:45 Go to next message
Ali Gamal is currently offline  Ali Gamal
Messages: 98
Registered: June 2013
Member
Hi,
my IDL program as

file='c:\a.sav'
restore,file,/st

V=[12,55,44,88,99]

x=sT[500,1000,15,0] ; it is an image

y=sT[500,1000,15,2] ; it is an image

I want to make

z=SUM(v*[x+y])


I want to result of z array as [500,1000,15,1], How can I do it ?

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Re: array summation [message #93442 is a reply to message #93441] Tue, 19 July 2016 07:12 Go to previous messageGo to next message
wlandsman is currently offline  wlandsman
Messages: 743
Registered: June 2000
Senior Member
On Tuesday, July 19, 2016 at 9:45:12 AM UTC-4, AGW wrote:
> Hi,
> my IDL program as
>
> file='c:\a.sav'
> restore,file,/st
>
> V=[12,55,44,88,99]
>
> x=sT[500,1000,15,0] ; it is an image
>
> y=sT[500,1000,15,2] ; it is an image
>
> I want to make
>
> z=SUM(v*[x+y])
>

z = total(v*[x+y])

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Re: array summation [message #93443 is a reply to message #93441] Tue, 19 July 2016 07:34 Go to previous messageGo to next message
Ali Gamal is currently offline  Ali Gamal
Messages: 98
Registered: June 2013
Member
On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
> Hi,
> my IDL program as
>
> file='c:\a.sav'
> restore,file,/st
>
> V=[12,55,44,88,99]
>
> x=sT[500,1000,15,0] ; it is an image
>
> y=sT[500,1000,15,2] ; it is an image
>
> I want to make
>
> z=SUM(v*[x+y])
>
>
> I want to result of z array as [500,1000,15,1], How can I do it ?

I try it before, It is not true, result of z is one value not array. I want the result as same dimension of input

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Re: array summation [message #93444 is a reply to message #93443] Tue, 19 July 2016 07:44 Go to previous messageGo to next message
wlandsman is currently offline  wlandsman
Messages: 743
Registered: June 2000
Senior Member
On Tuesday, July 19, 2016 at 10:34:50 AM UTC-4, AGW wrote:
> On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
>> Hi,
>> my IDL program as
>>
>> file='c:\a.sav'
>> restore,file,/st
>>
>> V=[12,55,44,88,99]
>>
>> x=sT[500,1000,15,0] ; it is an image
>>
>> y=sT[500,1000,15,2] ; it is an image
>>
>> I want to make
>>
>> z=SUM(v*[x+y])
>>
>>
>> I want to result of z array as [500,1000,15,1], How can I do it ?
>
> I try it before, It is not true, result of z is one value not array. I want the result as same dimension of input

Your original post was mostly jibberish.

v*[x+y] will be a 4 element array. What do you want to do with this array?

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Re: array summation [message #93448 is a reply to message #93441] Tue, 19 July 2016 09:46 Go to previous messageGo to next message
Craig Markwardt is currently offline  Craig Markwardt
Messages: 1869
Registered: November 1996
Senior Member
On Tuesday, July 19, 2016 at 9:45:12 AM UTC-4, AGW wrote:
> Hi,
> my IDL program as
>
> file='c:\a.sav'
> restore,file,/st
>
> V=[12,55,44,88,99]
>
> x=sT[500,1000,15,0] ; it is an image
>
> y=sT[500,1000,15,2] ; it is an image
>
> I want to make
>
> z=SUM(v*[x+y])
>
>
> I want to result of z array as [500,1000,15,1], How can I do it ?

It's not possible with the information you provided.
V is a 5 element vector.
X and Y are single scalar values, not images
The math you describe doesn't make sense with those inputs.

CM

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Re: array summation [message #93449 is a reply to message #93441] Tue, 19 July 2016 10:41 Go to previous messageGo to next message
Ali Gamal is currently offline  Ali Gamal
Messages: 98
Registered: June 2013
Member
On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
> Hi,
> my IDL program as
>
> file='c:\a.sav'
> restore,file,/st
>
> V=[12,55,44,88,99]
>
> x=sT[500,1000,15,0] ; it is an image
>
> y=sT[500,1000,15,2] ; it is an image
>
> I want to make
>
> z=SUM(v*[x+y])
>
>
> I want to result of z array as [500,1000,15,1], How can I do it ?

OK, x=sT[0:499,0:999,15,0] & x=sT[0:499,0:999,15,2]

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Re: array summation [message #93450 is a reply to message #93449] Tue, 19 July 2016 10:59 Go to previous messageGo to next message
wlandsman is currently offline  wlandsman
Messages: 743
Registered: June 2000
Senior Member
On Tuesday, July 19, 2016 at 1:41:07 PM UTC-4, AGW wrote:
> On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
>> Hi,
>> my IDL program as
>>
>> file='c:\a.sav'
>> restore,file,/st
>>
>> V=[12,55,44,88,99]
>>
>> x=sT[500,1000,15,0] ; it is an image
>>
>> y=sT[500,1000,15,2] ; it is an image
>>
>> I want to make
>>
>> z=SUM(v*[x+y])
>>
>>
>> I want to result of z array as [500,1000,15,1], How can I do it ?
>
> OK, x=sT[0:499,0:999,15,0] & x=sT[0:499,0:999,15,2]

OK so it appears that ST is a 4 dimensional array
and now X and Y are 2d images

Now what exactly do you want to do?

>> I want to make
>>
>> z=SUM(v*[x+y])

So you add X and Y to make another 2d image, and then you want to multiply by the 5 element vector v?

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Re: array summation [message #93452 is a reply to message #93441] Tue, 19 July 2016 13:42 Go to previous messageGo to next message
Ali Gamal is currently offline  Ali Gamal
Messages: 98
Registered: June 2013
Member
On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
> Hi,
> my IDL program as
>
> file='c:\a.sav'
> restore,file,/st
>
> V=[12,55,44,88,99]
>
> x=sT[500,1000,15,0] ; it is an image
>
> y=sT[500,1000,15,2] ; it is an image
>
> I want to make
>
> z=SUM(v*[x+y])
>
>
> I want to result of z array as [500,1000,15,1], How can I do it ?

OK thank, I will try it

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Re: array summation [message #93469 is a reply to message #93441] Tue, 26 July 2016 07:35 Go to previous messageGo to next message
Ali Gamal is currently offline  Ali Gamal
Messages: 98
Registered: June 2013
Member
On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
> Hi,
> my IDL program as
>
> file='c:\a.sav'
> restore,file,/st
>
> V=[12,55,44,88,99]
>
> x=sT[500,1000,15,0] ; it is an image
>
> y=sT[500,1000,15,2] ; it is an image
>
> I want to make
>
> z=SUM(v*[x+y])
>
>
> I want to result of z array as [500,1000,15,1], How can I do it ?

OK, now if x=st[0:499,0:999,0:14,0], I want to print values form 0:14 only, how can I do it

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Re: array summation [message #93470 is a reply to message #93469] Tue, 26 July 2016 11:20 Go to previous messageGo to next message
wlandsman is currently offline  wlandsman
Messages: 743
Registered: June 2000
Senior Member
On Tuesday, July 26, 2016 at 10:35:14 AM UTC-4, AGW wrote:
> On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
>> Hi,
>> my IDL program as
>>
>> file='c:\a.sav'
>> restore,file,/st
>>
>> V=[12,55,44,88,99]
>>
>> x=sT[500,1000,15,0] ; it is an image
>>
>> y=sT[500,1000,15,2] ; it is an image
>>
>> I want to make
>>
>> z=SUM(v*[x+y])
>>
>>
>> I want to result of z array as [500,1000,15,1], How can I do it ?
>
> OK, now if x=st[0:499,0:999,0:14,0], I want to print values form 0:14 only, how can I do it

Again, we have to guess what you are asking for.
Your array x is dimensioned [500, 1000, 15]
To print the first 15 values in x
IDL> print,x[0:14]
To print the 15 values along the third dimension starting at x[0,0,0]
IDL> print,x[0,0,*]

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Re: array summation [message #93471 is a reply to message #93441] Tue, 26 July 2016 12:22 Go to previous message
Ali Gamal is currently offline  Ali Gamal
Messages: 98
Registered: June 2013
Member
On Tuesday, July 19, 2016 at 3:45:12 PM UTC+2, AGW wrote:
> Hi,
> my IDL program as
>
> file='c:\a.sav'
> restore,file,/st
>
> V=[12,55,44,88,99]
>
> x=sT[500,1000,15,0] ; it is an image
>
> y=sT[500,1000,15,2] ; it is an image
>
> I want to make
>
> z=SUM(v*[x+y])
>
>
> I want to result of z array as [500,1000,15,1], How can I do it ?

thanks for your replay

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