Sharp PC-1403

4 4
In addition, matrixes X , Y , a nd M a r e st o r ed i n th e sa m e mem ory area as BASIC
arrays X(* , *) , Y (* . *), a n d M (* . * ). Jn o t h er wor d s , t h e val u e s of t he matrix
elements en t ered i n th e BAS I C mode ca n b e c a l cula t e d in the CAL m od e.
When enter i ng t he v a lues of matr i x e l em e n t s i n th e B ASIC mode , p ay a ttention t o t he
followin g p oi nt s :
(1) Ma t rix ele m e n ts X (i , k ) correspon d t o B AS I C a rr a y elem en ts X( i- 1, k -1 ). F o r
ex am p l e , X( 1 ,2) c o rr es pon d to a r ra y X( 0 , 1 ) .
(2) Al l t h e m a tr ix e lem ent val ues s t or e d i n mem ory will be c lear ed b y BASIC
command RUN , C L E A R, o r NE W .
Input ot Matrix Element
In the C AL mod e , p r e ssing IS H I FT I rn o r l s H 1 nl rn ca u s e s t h e C O MPUTER t o
en t e r th e MATRIX m ode . I n t h i s mo de , y ou ca n ent e r t he e l e ments o f a m a t ri x for
c a l c ul ati on o f t he matrix, as well as t o ha ve t he c o mpu te r p erfo rm m at r ix o per ati o ns
and di s pl ay t h e mat r ix e l e men ts e nt er e d.
Th e k eys a n d t he ir fun c t i o ns use d to en t e r a nd di s pl ay matri x e l em en t s are as
des cr i b ed be l o w .
W i th t h is c omp ute r , suc h an arr a y is e x p res s ed as m a t r i x .X, Y , o r M . O ne o f t he s e t s
of n umbers whic h for m a m a t ri x i s calle d a ma tr ix e l e m ent. M a tr ix el e me nt a 1 1 i s
e x pres s e d a s X(1,1 ) , Y (1 , 1 ) , or M ( 1 , 1 ) . Th e ho r izontal a r ra ngement o f ma trix
el e ment s i s ca ll ed a row wh il e t h e vert i ca l a r r ang e me nt i s calle d a co lu mn.
Matrix Configuration
With the COMPUTER , three matr i xes X , Y , an d M ca n b e de f i ned . Ea c h m a t r i x can be
defined w i thin a range of 1 to 99 b ot h ve rt i call y (i . e. , colu mn s) an d h ori zontally
(i.e., rows). Howeve r, the tota l m a trix s i z e is depe nde nt up o n t he memory capacity
of the COMPUTER .
a , 2 a , n J
a2 2 a ?n
am 2 ····· · a mn
A mat r i x is a re c ta ngu lar array a ; k {i = 1 , 2 . . . , rn , k = 1 , 2 . . . , n) o f a g i ve n se t of
numb ers (m x n e l e m e nts) as s hown be l ow .
In the CA L m od e , the C O M P U TE R h as a fu n c t i o n to c al c ul ate m at ri x e s or t he i r
determ i nant v alues .
Matrix Calculation Function
Using as a Calculator