Numerical Analysis

Archive for April, 2013

Re: Approximating partial derivatives (2 dimensions)

- — -

> Basicly, i have the values f(x+nh,y+nh), with n an
> integer in some range (for example [0,99]) and would
> like to approximate both of the partial derivatives
> in each of those points. After some googling i found
> some 1-dimensional method and was able to adapt that
> to the 2-dimensions using the R^2 analogy of the
> Taylor polynomial.
> Due to a technical limitation, i cannot use the whole
> set of points for approximation. Instead, all i have
> is a 3 by 3 grid of points centered at the point of
> interest. The following picture should make it
> absolutely clear:

> YYY
> YXY
> YYY

> The partial derivatives are to be calculated for the
> point marked with X. The values of the function are
> available for each of these 9 points.

> Using 1st degree taylor polynomials expanded around
> the middle point i can produce formulas that are a
> linear combination of the values divided by some
> constant. But I have no idea if my approach is
> appropriate for the situation, and if it is, which
> points should i use?

What’s the underlying partial differential equation
you are trying to solve ?

Best wishes
Torsten.

.
posted by admin in Uncategorized and have Comments (2)

Re: Approximating partial derivatives (2 dimensions)

- — -

> Basicly, i have the values f(x+nh,y+nh), with n an
> integer in some range (for example [0,99]) and would
> like to approximate both of the partial derivatives
> in each of those points. After some googling i found
> some 1-dimensional method and was able to adapt that
> to the 2-dimensions using the R^2 analogy of the
> Taylor polynomial.
> Due to a technical limitation, i cannot use the whole
> set of points for approximation. Instead, all i have
> is a 3 by 3 grid of points centered at the point of
> interest. The following picture should make it
> absolutely clear:

> YYY
> YXY
> YYY

> The partial derivatives are to be calculated for the
> point marked with X. The values of the function are
> available for each of these 9 points.

> Using 1st degree taylor polynomials expanded around
> the middle point i can produce formulas that are a
> linear combination of the values divided by some
> constant. But I have no idea if my approach is
> appropriate for the situation, and if it is, which
> points should i use?

What’s the underlying partial differential equation
you are trying to solve ?

Best wishes
Torsten.

posted by admin in Uncategorized and have Comments (2)

Re: Approximating partial derivatives (2 dimensions)

- — -

> Basicly, i have the values f(x+nh,y+nh), with n an
> integer in some range (for example [0,99]) and would
> like to approximate both of the partial derivatives
> in each of those points. After some googling i found
> some 1-dimensional method and was able to adapt that
> to the 2-dimensions using the R^2 analogy of the
> Taylor polynomial.
> Due to a technical limitation, i cannot use the whole
> set of points for approximation. Instead, all i have
> is a 3 by 3 grid of points centered at the point of
> interest. The following picture should make it
> absolutely clear:

> YYY
> YXY
> YYY

> The partial derivatives are to be calculated for the
> point marked with X. The values of the function are
> available for each of these 9 points.

> Using 1st degree taylor polynomials expanded around
> the middle point i can produce formulas that are a
> linear combination of the values divided by some
> constant. But I have no idea if my approach is
> appropriate for the situation, and if it is, which
> points should i use?

What’s the underlying partial differential equation
you are trying to solve ?

Best wishes
Torsten.

posted by admin in Uncategorized and have Comments (2)

Re: Approximating partial derivatives (2 dimensions)

- — -

> Basicly, i have the values f(x+nh,y+nh), with n an
> integer in some range (for example [0,99]) and would
> like to approximate both of the partial derivatives
> in each of those points. After some googling i found
> some 1-dimensional method and was able to adapt that
> to the 2-dimensions using the R^2 analogy of the
> Taylor polynomial.
> Due to a technical limitation, i cannot use the whole
> set of points for approximation. Instead, all i have
> is a 3 by 3 grid of points centered at the point of
> interest. The following picture should make it
> absolutely clear:

> YYY
> YXY
> YYY

> The partial derivatives are to be calculated for the
> point marked with X. The values of the function are
> available for each of these 9 points.

> Using 1st degree taylor polynomials expanded around
> the middle point i can produce formulas that are a
> linear combination of the values divided by some
> constant. But I have no idea if my approach is
> appropriate for the situation, and if it is, which
> points should i use?

What’s the underlying partial differential equation
you are trying to solve ?

Best wishes
Torsten.

posted by admin in Uncategorized and have Comments (2)

Re: Approximating partial derivatives (2 dimensions)

- — -

> Basicly, i have the values f(x+nh,y+nh), with n an
> integer in some range (for example [0,99]) and would
> like to approximate both of the partial derivatives
> in each of those points. After some googling i found
> some 1-dimensional method and was able to adapt that
> to the 2-dimensions using the R^2 analogy of the
> Taylor polynomial.
> Due to a technical limitation, i cannot use the whole
> set of points for approximation. Instead, all i have
> is a 3 by 3 grid of points centered at the point of
> interest. The following picture should make it
> absolutely clear:

> YYY
> YXY
> YYY

> The partial derivatives are to be calculated for the
> point marked with X. The values of the function are
> available for each of these 9 points.

> Using 1st degree taylor polynomials expanded around
> the middle point i can produce formulas that are a
> linear combination of the values divided by some
> constant. But I have no idea if my approach is
> appropriate for the situation, and if it is, which
> points should i use?

What’s the underlying partial differential equation
you are trying to solve ?

Best wishes
Torsten.

posted by admin in Uncategorized and have Comments (2)

`****HOT SEXY PHOTOS&VIDEOS****

                 SAMEERAREDDY HOT BOOBS
http://karomasti9.blogspot.com/2011/01/sameerareddy.html
               HOT SEXY ACTRESS
  http://karomasti9.blogspot.com/2011/01/hot.html
               latest hot sruthi hassan stills
 http://karomasti9.blogspot.com/2011/01/shurthihassan-new-stills.html
            UNSEEN HOT SEXY PHOTOS
 http://karomasti9.blogspot.com/2011/01/never.html
             SAMANTHA HOT SEXY PHOTOS
http://karomasti9.blogspot.com/2011/01/samantha.html
                        SEXY DIYA MIRZA
   http://karomasti9.blogspot.com/2010/12/diya-mirza.html
                        HOT AISHWARIYA RAI
http://karomasti9.blogspot.com/2010/12/aish.html
                     priyamani hot&sexy photos
http://karomasti9.blogspot.com/2010/12/priyamani.html
                      KATRINA SEXY PHOTOS
http://karomasti9.blogspot.com/2010/12/katrina.html
                 ANUSHKA HOT PHOTOS
http://karomasti9.blogspot.com/2010/12/anuska.html
                    BEAUTIFUL AISHWARIYA RAI
http://karomasti9.blogspot.com/2010/12/aiesh.html
                    TRISHA HOT PHOTOS
http://karomasti9.blogspot.com/2010/11/trisha-hot.html
              AMISHAPATEL HOT VIDEOS
http://karomasti9.blogspot.com/search/label/amisha
             HANSIKHA HOT SEXY PHOTOS
http://karomasti9.blogspot.com/search/label/HANSIKA
             HOT SEXY COLLEGE GIRLS
http://karomasti9.blogspot.com/search/label/hot
              BEAUTIFUL LARADATTA
http://karomasti9.blogspot.com/search/label/laradatta
              NIKISHA HOT BOOBS
http://karomasti9.blogspot.com/search/label/nikisha
           PRIYANKA SPICY LATEST PICS
http://karomasti9.blogspot.com/search/label/priyanka
              ONLY FOR YOUTH
http://karomasti9.blogspot.com/search/label/spicy
           SRILEKHA UNSEENED PHOTOS
http://karomasti9.blogspot.com/search/label/Srilekha
             CHOPRA UNBELIVABLE PHOTOS
http://karomasti9.blogspot.com/search/label/chopra
              HOT BIPASA BASU PHOTOS
http://karomasti9.blogspot.com/search/label/bipasa
              TRISHA IN A SEXY FEEL
http://karomasti9.blogspot.com/search/label/thrisha
           SRISHA HOT BOOBS SHOW
http://karomasti9.blogspot.com/search/label/srisha
           BEAUTIFUL POONAM PHOTOS
http://karomasti9.blogspot.com/search/label/poonam

posted by admin in Uncategorized and have No Comments

[[[[ bikini girls naked

http://www.photovediodating.com
Free mobile software downloads
http://www.celebsimzs.com

posted by admin in Uncategorized and have No Comments

quaternions and examples to test with tia sal22

Greetings All

I have a couple of matlab M files that use quaternions,  I would like to test them out but I’m having a hard time finding good quaternion example problems that show the process/the work can anybody reccommed some or a site that has some?

tia sal22

posted by admin in Uncategorized and have No Comments

`****HOT SEXY PHOTOS&VIDEOS****

                 SAMEERAREDDY HOT BOOBS
http://karomasti9.blogspot.com/2011/01/sameerareddy.html
               HOT SEXY ACTRESS
  http://karomasti9.blogspot.com/2011/01/hot.html
               latest hot sruthi hassan stills
 http://karomasti9.blogspot.com/2011/01/shurthihassan-new-stills.html
            UNSEEN HOT SEXY PHOTOS
 http://karomasti9.blogspot.com/2011/01/never.html
             SAMANTHA HOT SEXY PHOTOS
http://karomasti9.blogspot.com/2011/01/samantha.html
                        SEXY DIYA MIRZA
   http://karomasti9.blogspot.com/2010/12/diya-mirza.html
                        HOT AISHWARIYA RAI
http://karomasti9.blogspot.com/2010/12/aish.html
                     priyamani hot&sexy photos
http://karomasti9.blogspot.com/2010/12/priyamani.html
                      KATRINA SEXY PHOTOS
http://karomasti9.blogspot.com/2010/12/katrina.html
                 ANUSHKA HOT PHOTOS
http://karomasti9.blogspot.com/2010/12/anuska.html
                    BEAUTIFUL AISHWARIYA RAI
http://karomasti9.blogspot.com/2010/12/aiesh.html
                    TRISHA HOT PHOTOS
http://karomasti9.blogspot.com/2010/11/trisha-hot.html
              AMISHAPATEL HOT VIDEOS
http://karomasti9.blogspot.com/search/label/amisha
             HANSIKHA HOT SEXY PHOTOS
http://karomasti9.blogspot.com/search/label/HANSIKA
             HOT SEXY COLLEGE GIRLS
http://karomasti9.blogspot.com/search/label/hot
              BEAUTIFUL LARADATTA
http://karomasti9.blogspot.com/search/label/laradatta
              NIKISHA HOT BOOBS
http://karomasti9.blogspot.com/search/label/nikisha
           PRIYANKA SPICY LATEST PICS
http://karomasti9.blogspot.com/search/label/priyanka
              ONLY FOR YOUTH
http://karomasti9.blogspot.com/search/label/spicy
           SRILEKHA UNSEENED PHOTOS
http://karomasti9.blogspot.com/search/label/Srilekha
             CHOPRA UNBELIVABLE PHOTOS
http://karomasti9.blogspot.com/search/label/chopra
              HOT BIPASA BASU PHOTOS
http://karomasti9.blogspot.com/search/label/bipasa
              TRISHA IN A SEXY FEEL
http://karomasti9.blogspot.com/search/label/thrisha
           SRISHA HOT BOOBS SHOW
http://karomasti9.blogspot.com/search/label/srisha
           BEAUTIFUL POONAM PHOTOS
http://karomasti9.blogspot.com/search/label/poonam

posted by admin in Uncategorized and have No Comments

[[[[ bikini girls naked

http://www.photovediodating.com
Free mobile software downloads
http://www.celebsimzs.com

posted by admin in Uncategorized and have No Comments