@nm i am interested in your activity and all of your nice posts ...

i am not an expert but i found duplication is helpfull in some cases for new users or who only works in a limited criterion for their own purpose .

-for example suppose i am only familar with the commands of Student:-LinearAlgebra: package , then if the Diagonal(A) command removed from here , it make me needful to refere to MTM:-diag(A) or LinearAlgebra:-Diagonal(A) and subsequently i must spend a lots of time for underestanding the functions in such packages too... that cause confusion and exponential increase in time needed for focusing .

the discussable drawback that remain here is only in different benchmark results of those diferent commands with the same puropse ! and underlaid structure ...

-also i have the same idea about notations because some of them are easier according to person , place , time ... so they must not removed !

-about help document of maple :

in comparsion with previous version of it , great and valuable updates made by maple developers although it is not flawless, and the exploration method for subjects and tracking of pages linkes into the current page are very useful .

totally i prefer the style of maple help and i wish their developers make it better with more facilities and troublshoting !

can you believe when i tried to remember the simple formula for surface/volume of a sphere or cone ... and i searched the standalone document of Mathematica i got noting ! that made me crazy ...also i can't find a definitive way for exploration in document of Mathematica and you will reach constantly to some pages circulary !

the calculations are very beautiful

thanks for your worthful maple worksheet

@Carl Love 

I admire your IQ 

you are really intelligent

thanks you very much (Carl Devore)

great treasure !

what about to have reputations for maple users contribute to rosettacode.org ?

i guess it may Encourage them !

the outstanding features of this release are incredible !

What happens when such Facilities falls into the hands of scientists ?

you mathematicaly proved that LOVE exist

I wish one day I could win the Möbius prize ...

summum bonum

@Alejandro Jakubi 

thanks for branching ...

i do not know why while copying and pasting subscripts lik this , the structure of the original expression don't remain intact ?

@Alejandro Jakubi 

so dummy i didn't notic to it so far :(

@Carl Love thanks a lot for your attention !

in this 64x64 pixel image is a Khaki circle with RGB values [240, 230, 140]

now my purpose is to manipulate only the pixels that located on the khaki circle and change their colors regardless of rest of image ...

by this way i want to extract the positions first , then count them , and assign new color values to them according to my custom function !

sincerely for your instruction !

i have an image processing project that is relevant to finding the coordinate of special pixels in an image

the only command i know for my purpose is ArrayTools[SearchArray]

http://www.maplesoft.com/support/help/Maple/view.aspx?path=ArrayTools/SearchArray

but unfortunately it only return two indices (usabele only for monochrom images , not RGB images) and also it match all nonzero values but i need exact value ! ( do you have a better offer ? )

then i found my desierd function in mathematica : PixelValuePositions

as you see it return the indices in the form : {{x,y} , ..}

i am not very familiar with mathematica and i have to do my project in maple and as you know

for making an array from indices the construction is (x,y)=value ...

i will become so glad if you know an efficient different way ?

now i think we have the equivalent ++ operator here !

now i think we have the equivalent ++ operator here !

indeed

i should try it :-)