Ex 4.3 Dichotomy function
var('a','b','N')
(a, b, N)
def Dichotomy(a,b,N):
if f(a)*f(b) >= 0:
print "Don't bother me or my wrath shall fall upon you"
lb = a
ub= b
for i in range(1, N):
mp = (lb+ub)/2
if f(mp) == 0:
lb = mp
up = mp
if(((f(mp)<0) & (f(lb)<0)) | ((f(mp)>0) & (f(lb)>0))):
lp = mp
else: up = mp
return [lb,ub,ub-lb]
Dichotomy(1,2,10)
Don't bother me or my wrath shall fall upon you
Error in lines 1-1
Traceback (most recent call last):
File "/cocalc/lib/python2.7/site-packages/smc_sagews/sage_server.py", line 1013, in execute
exec compile(block+'\n', '', 'single') in namespace, locals
File "", line 1, in
File "", line 11, in Dichotomy
TypeError: unsupported operand type(s) for &: 'sage.symbolic.expression.Expression' and
'sage.symbolic.expression.Expression'
You did not provide the function
fthat you are using in your example.Maybe you could add an extra argument
ftodichotomy.Note: arguments of Python functions don't need to be declared as symbolic variables.
(You can remove the line
var(...).)