 ## Latest Posts

Write a sample program to perform Addition(+), Subtraction(-), Dot product,Cross product between two vectors. Also find angle between two vectors.

```from math import *

class vector:
def __init__(self, x, y, z):
self.x = float(x)
self.y = float(y)
self.z = float(z)
def dot(self, other):
return self.x*other.x + self.y*other.y + self.z*other.z
def cross(self, other):
return vector(self.y*other.z-self.z*other.y, self.z*other.x-self.x*other.z, \
self.x*other.y-self.y*other.x)
def mod(self):
return pow(self.x**2+self.y**2+self.z**2, 0.5)
def __sub__(self, other):
return vector(self.x-other.x, self.y-other.y, self.z-other.z)
return vector(self.x+other.x, self.y+other.y, self.z+other.z)
def __str__(self, precision=2):
return str(("%."+"%df"%precision)%float(self.x))+'i'+('+' if self.y>=0 else '-')+ \
str(("%."+"%df"%precision)%float(abs(self.y)))+'j'+('+' if self.z>=0 else '-')+\
str(("%."+"%df"%precision)%float(abs(self.z)))+'k'
if __name__ == "__main__":
print "Enter x,y,z(separeated by space) value of vector-1"
A = vector(*map(float, raw_input().strip().split()))
print "Enter x,y,z(separeated by space) value of vector-2"
B = vector(*map(float, raw_input().strip().split()))

print "A + B: " + str(A+B)
print "A - B: " +str(A-B)
print "A[.]B: " + str(A.dot(B))
print "A[X]B: " + str(A.cross(B))
print "Modulas of A (|A|): " + str(A.mod())
print "Modulas of B (|B|): "+ str(B.mod())
print "Angle between then in radian is %.2f"%degrees(acos(A.dot(B)/(A.mod()*B.mod())))
```
Sample output:-
>>>
Enter x,y,z(separated by space) value of vector-1
2 4 -5
Enter x,y,z(separated by space) value of vector-2
-1 3 -2
A + B: 1.00i+7.00j-7.00k
A - B: 3.00i+1.00j-3.00k
A[.]B: 20.0
A[X]B: 7.00i+9.00j+10.00k
Modulas of A (|A|): 6.7082039325
Modulas of B (|B|): 3.74165738677
Angle between then in radian is 37.17

Explanation:-
Here we have used operator overloading concept to add/subtract vectors. Refer this for another example of operator overloading in Python.In order to find radian value of angle between two vector used math.acos(x) which return the arc cosine of x, in radians.

1. 2. I am glad that I saw this post. It is informative blog for us and we need this type of blog thanks for share this blog, Keep posting such instructional blogs and I am looking forward for your future posts.
Python Projects for Students

Data analytics is the study of dissecting crude data so as to make decisions about that data. Data analytics advances and procedures are generally utilized in business ventures to empower associations to settle on progressively Python Training in Chennai educated business choices. In the present worldwide commercial center, it isn't sufficient to assemble data and do the math; you should realize how to apply that data to genuine situations such that will affect conduct. In the program you will initially gain proficiency with the specialized skills, including R and Python dialects most usually utilized in data analytics programming and usage; Python Training in Chennai at that point center around the commonsense application, in view of genuine business issues in a scope of industry segments, for example, wellbeing, promoting and account.

Project Center in Chennai

3. 4. i am not getting the output