MATLAB Function Reference Volume 1: A - E - Bad Request

f( x, y)
31 ( – x)
2e x2 – ( y + 1)
2 – 10 x
-- x3 – y5 ⎛ – ⎞ex2 – y2 =
–
–
ezcontourf
ezcontourf requires a string argument that expresses this function using
MATLAB syntax to represent exponents, natural logs, etc. This function is
represented by the string:
f = ['3*(1−x)^2*exp(−(x^2)−(y+1)^2)',...
'− 10*(x/5 − x^3 − y^5)*exp(-x^2−y^2)',...
'- 1/3*exp(−(x+1)^2 − y^2)'];
For convenience, this string is written on three lines and concatenated into one
string using square brackets.
Pass the string variable f to ezcontourf along with a domain ranging from −3
to 3 and specify a grid of 49-by-49:
y
ezcontourf(f,[-3,3],49)
3
2
1
0
−1
−2
⎝5⎠ 3 (1−x) 2 exp(−(x 2 ) − (y+1) 2 )− ~~~ x 2 −y 2 )− 1/3 exp(−(x+1) 2 − y 2 )
−3
−3 −2 −1 0
x
1 2 3
1
--e ( x + 1)
3
2 – y2 –
–
In this particular case, the title is too long to fit at the top of the graph so
MATLAB abbreviates the string.
2-521