Lapack

[eirinikp]

Hello!

Mipws kaneis apo sas asxoleitai me ti Lapack?

Sas exw mia erwtisi...

[eirinikp]

OK. Ap oti blepw den uparxoun e8elontes.

8a eimai loipon pio analutiki kai apli:

Exw ena summetriko pinaka n*n o opoios exei mi midenika stoixeia sti diagwnio, se k uperdiagwnious kai se k upodiagwnious. Auton loipon, enw einai stin pragmatikotita kapws etsi:

a_11 a_12 … a_1k 0 … 0 0

a_12 a_22 a_23 … a_2(k+1) 0 … 0

 

 

0 … 0 a_(n-k-1)(n-1) … a_(n-2)(n-1) a_(n-1)(n-1) a_(n-1)n

0 0 … 0 a_(n-k)n … a_(n-1)n a_nn

 

Kai gia oikonomia xwrou apo8ikeuetai etsi:

a_1k ... a_12 a_11

a_2(k+1) ... a_23 a_22

 

a_k(2k) … a_k(k+1) a_kk

 

* a_(n-k+1)n a_(n-k+1)(n-k+2) a_(n-k+1)(n-k+1)

 

* ... a_(n-1)n a_(n-1)(n-1)

* * * * ... * a_nn

(opou * simainei oti den apo8ikeuetai tipota ekei kai to programma den asxoleitai me auti ti 8esi mnimis)

(diladi ta diagwnia stoixeia apo8ikeuontai stin teleutai stili kai ta stixeia tis uperdiagwniou stin antistixi grammi, apo de3ia pros ta aristera, enw stis 8eseis pou den uparxei kati ston pinaka mpainoun *)

8elw loipon auton ton pinaka (se auti ti morfi pou exei apo8ikeutei) na ton pollaplasiasw me ena dianusma mikous n

Epeidi omws einai ligo xawdis i katastasi, opoios mporei na boi8isei gia to pws 8a paei o pollaplasiasmos, 8a tou xrwstaw pragmatika eugnwmosini!!!

(Kala oi pinakes exoun graftei ligo xalia, elpizw na exete megali fantasia kai na diabasete tin epe3igisi apo katw!!!)

 

 

Gia na doume, uparxei estw kai enas telika se auto to forum pou na asxoleitai me liga ma8imatika???

[djapal]

τι είπες τώρα.... δε βλέπω να απαντά και κανένας!

[eirinikp]

Ela, eisai o prwtos e8elontis?

Katalabes kati apo auta pou rwtaw? An 8es perissoteres e3igiseis rwta gia na doume mipws broume akri!!!!

[Directx]

Δεν έχω ιδέα επί Lapack (γραμμική άλγεβρα) - πάντως υπάρχει μια C++ βιβλιοθήκη για δ' αυτήν, μπορεί να φανεί χρήσιμη (άραγε..) http://math.nist.gov/lapack++/

 

Αυτά για τους απανταχού φίλους της C/C++ βέβαια

[eirinikp]

Filoi tis C/C++ eimaste, alla to problima pou periegrapsa den afora to pws 8a xrisimopoiisw kapoia sunartisi tis Lapack. (Auto einai aplo)

To problima pou perigrafw afora tin katanoisi tou pws douleuoun kapoies sunartiseis tis Lapack. Diladi me alla logia auto pou perigrafw exei ulopoii8ei apo autous pou tin egrapsan (Den 3erw an kaneis apo autous einai melos tou insomnia!!! Auto sigoura 8a boi8ouse )

[djapal]

αν ζητούσες για java να σε βοηθούσα... αλλά Lapack!!!! τι είναι τούτη πάλι;;;

[eirinikp]

H Lapack einai to Linear Algebra PACKage http://www.netlib.org/lapack/ to opoio einai grammeno se Fortran (... ) kai exei polles etoimes sunartiseis gia epilusi grammikwn sustimatwn, eyresi idiotimwn, idiodianusmatwn, metatropes pinakwn, oti exei ulopoii8ei mexri twra sxetiko me grammiki algebra. Gia na to xrisimopoiiseis den einai aparaitito eutuxws na grafeis se Fortran! Aplws autoi pou to emploutizoun ti briskoun apo oti fainetai me ti Fortran! Ti na pei kaneis? Gousta!!!

Pantws an kapoia stigmi 8elw boi8eia sti Java 8a se 8umi8w!!!

[FarCry]

Gia na doume, uparxei estw kai enas telika se auto to forum pou na asxoleitai me liga ma8imatika???

 

IRC.FREENODE.NET

 

#math

 

Rotise tous masters.

 

Aplws autoi pou to emploutizoun ti briskoun apo oti fainetai me ti Fortran! Ti na pei kaneis? Gousta!!!

 

de ti briskoun me tin FORTRAN, i FORTRAN gia auto to skopo ftiaxtike.

 

Fortran is a general-purpose, procedural, imperative computer programming language that is especially suited to numeric computation and scientific computing.

[eirinikp]

 

de ti briskoun me tin FORTRAN, i FORTRAN gia auto to skopo ftiaxtike.

 

Fortran is a general-purpose, procedural, imperative computer programming language that is especially suited to numeric computation and scientific computing.

 

Enta3ei bre, to 3erw.

Allwste einai kai i prwti glwssa pou mas dida3an sti sxoli (Efarmosmena Ma8.)

Omws par'ola auta oles tis dikes mou numeric computations tis kanw se C!

Kako einai na deixnei kaneis tin protimisi tou se mia glwssa? :grin: