<p>Length</p>

2e83b561-c452-43df-a4a7-22d91abec7c6 22 4 5 false false 0 decimal

&[DATE] &[TIME] - &[FILENAME]

<p>Length</p>

Rows(x) extends  rows(x) for return 0 for atom expressions. x\032E\ Rows ans\0324\ x\032E\ rows : (0 > 0 try ans\0324\ 0 if 11 line :

abc Rows 1 Rows x Rows 1 x 21 mat Rows x y z t 22 mat Rows a b 21 sys Rows 61 sys 00022061 sys

Cols(x) extends cols(x) for return 0 for atom expressions. x\032E\ Cols ans\0324\ x\032E\ cols : (0 > 0 try ans\0324\ 0 if 11 line :

Length(x) extends length(x) for return 0 for scalars and strlength for strings. x\032E\ Length ans\0324\ x\032E\ length : (0 > 0 try ans\0324\ x\032E\ IsString 0 try x\032E\ strlen 0 if if 11 line :

abc Length 1 Length x Length 1 x 21 mat Length x y z t 22 mat Length a b 21 sys Length 61 sys 30024061 sys

Size(x) returns [Rows(x) Cols(x)] x\032E\ Size R\0324\ x\032E\ rows : (C\0324\ x\032E\ cols : (+ 0 > 0 try R\0324\ C\0324\ 12 mat 0012 mat if 11 line :

abc Size 1 Size x Size 1 x 21 mat Size x y z t 22 mat Size a b 21 sys Size 61 sys 0012 mat 0012 mat 0012 mat 2112 mat 2212 mat 0012 mat 61 sys

IsMatrix(x) true if x is a matrix. x\032E\ IsMatrix x\032E\ Rows 0 ≠ 11 line :

IsMatrix(x) true if x is a column vector. x\032E\ IsVector x\032E\ Rows 0 ≠ (x\032E\ Cols 1 ≡ (& 11 line :

abc IsMatrix 1 IsMatrix x IsMatrix 1 x 21 mat IsMatrix x y z t 22 mat IsMatrix a b 21 sys IsMatrix 61 sys 00011061 sys

abc IsVector 1 IsVector x IsVector 1 x 21 mat IsVector x y z t 22 mat IsVector a b 21 sys IsVector 61 sys 00010061 sys

abc GetType 1 GetType x GetType 1 x 21 mat GetType x y z t 22 mat GetType a b 21 sys GetType 1221 mat GetType 1221 sys GetType 81 sys string number unknown unknown unknown unknown matrix system 81 sys

For more complicate structure, I use this:

a x y z t 22 mat * IsMatrix 0

x\032E\ IsMat x\032E\ num2str mat(findstr 1 - ≠ 11 line :

a x y z t 22 mat * IsMat 1

I found this in the forum, but not anotate from who (added IsDefined):

x# Type x# IsDefined clear clear 11 line : testVar IsM# numRows testVar rows num2str : numRows 21 line : clear x# IsM# : c1# clear 11 substr : c1# r ≡ (c1#, ≡ (| (c1#) ≡ (| c1# r ≡ clear 61 substr s ≡ sys clear 61 substr ∞ ≡ num x# IsString 1 ≡ str num if if if c1#) ≡ str sys if if mat if 51 line unknown if 11 line :

abc Type 1 Type x Type 1 x 21 mat Type x y z t 22 mat Type a b 21 sys Type 1221 mat Type 1221 sys Type 81 sys str num unknown unknown unknown unknown mat sys 81 sys

Alvaro

x k^k 13 sum x 1 x + x 2^+ (*

x k^k 13 sum x 1 x + x 2^+ (*

x IsDefined 0

M eigenvals M eigenvalues maple 11 line :

M 123422 mat :

M eigenvals 5.3723 0.3723 - 21 mat

M eigenvals 533 sqrt + 2 / 533 sqrt - 2 / 21 mat

f x Collect x f x / (* 11 line :

xxx x k^k 13 sum :

xx xxx :

xx num2str sum(x^k,k,1,3)

x kernel x maple 11 line :

y.S# k.S# a.S# b.S# Sum.For S# 0 : t.S# f.S# f.S# y.S# k.S# t.S# Function : κ.S# a.S# b.S# range S# S# κ.S# f.S# Eval + : for S# Eval 41 line :

y.S# k.S# a.S# b.S# Prod.For P# 1 : t.P# f.P# f.P# y.P# k.P# t.P# Function : κ.P# a.P# b.P# range P# P# κ.P# f.P# Eval * : for P# Eval 41 line :

k.F# r.F# y.P# For t.F# f.F# f.F# y.P# k.P# t.F# Function : r.F# f.F# vectorize 21 line :

x Simplify x x Eval : y.S# k.S# a.S# b.S# sum y.S# k.S# a.S# b.S# Sum.For : y.P# k.P# a.P# b.P# product y.S# k.S# a.S# b.S# Prod.For : k.F# r.F# y.P# for k.F# r.F# y.P# For : x x Eval : 51 line :

10 f #

for

x f s 0 : k 1 x range s s 2 x * + : for s 31 line :

for description 0

for

x f x 12 int Simplify #

x f x 12 int Simplify #

x f s 0 : k 0 : k 4 < k k 1 + : s s 2 x * + : 21 line while s 41 line :

x n For k 0 : k 4 < k k 1 + : s x : 21 line while s 31 line :

x f k 12 sum x 12 int 24