magic help magic magic Magic square magic is an N-by-N matrix construc

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>> A = magic(3)
A =
8 1 6
3 5 7
4 9 2
>> help magic
magic Magic square.
magic(N) is an N-by-N matrix constructed from the integers
1 through N^2 with equal row, column, and diagonal sums.
Produces valid magic squares for all N > 0 except N = 2.
Reference page in Help browser
doc magic
>> b = [1; 0; 1]
b =
1
0
1
>> a\b
Cannot find an exact (case-sensitive) match for 'a'
The closest match is: A
in C:\Users\11\Documents\MATLAB\A.m
Did you mean:
>> A\b
ans =
0.2111
0.0444
-0.1222
>> x = A\b
x =
0.2111
0.0444
-0.1222
>> A*x - b
ans =
1.0e-15 *
0
0.1110
0
>> det(A)
ans =
-360
>> A = [A; zeros(2,3)]
A =
8 1 6
3 5 7
4 9 2
0 0 0
0 0 0
>> rank(A)
ans =
3
>> x = A\b
Error using \
Matrix dimensions must agree.
>> b = [b; 0;0]
b =
1
0
1
0
0
>> x = A\b
x =
0.2111
0.0444
-0.1222
>> A = [A zeros(5,2)]
A =
8 1 6 0 0
3 5 7 0 0
4 9 2 0 0
0 0 0 0 0
0 0 0 0 0
>> x = pinv(A)*b
x =
0.2111
0.0444
-0.1222
0
0
>> syms y
>> solve(y^2-6y-10)
solve(y^2-6y-10)
|
Error: Unexpected MATLAB expression.
>> solve(y^2-6*y-10)
ans =
19^(1/2) + 3
3 - 19^(1/2)
>> mupad
ans =
MuPAD notebook
>> solve(sin(y) - 6)
ans =
asin(6)
pi - asin(6)
>> syms x real
>> syms y real
>> solve(y^2-x*y-10, y)
ans =
x/2 + (x^2 + 40)^(1/2)/2
x/2 - (x^2 + 40)^(1/2)/2
>> solve(y^2-x*y-10, y);
>> mupad
ans =
MuPAD notebook
>> symlink
Undefined function or variable 'symlink'.
>> symlink