def covariance(xVec, yVec):
#tester = np.vstack((xVec,yVec))
n=len(xVec)
xBar = mean(xVec)
yBar = mean(yVec)
covar = 0;
for i in range(0,n):
covar += float((xVec[i]-xBar)*(yVec[i]-yBar))
#print("The python covariance is " + str(np.cov(tester)))
#print("The N covariance is: " + str(covar/n))
return covar/(n-1) #The sample covariance
def test_complex():
# given that complex numbers are an unordered field
# the arithmetic mean of complex numbers is meaningless
num_list = [2 + 3j, 3 + 4j, -32 - 2j]
obs = mean(num_list)
exp = NotImplemented
assert obs == exp
def test_complex():
# given that complex numbers are an unordered field
# the arithmetic mean of complex numbers is meaningless
num_list = [2 + 3j, 3 + 4j, -32 - 2j]
obs = mean(num_list)
exp = NotImplemented
assert obs == exp
def test_ints():
# test caculating the mean of ints
num_list = [1, 2, 3, 4, 5]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_neg():
nums = [
-1,
1,
]
obs = mean(nums)
exp = 0
assert obs == exp
def test_zero():
num_list=[0,2,4,6]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_neg():
num_list = [-1, 1]
obs = mean(num_list)
exp = 0
assert obs == exp
def test_zero():
num_list=[0,2,4,6]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_long():
big = 100000000
obs = mean(range(1,big))
exp = big/2.0
assert obs == exp
def test_ints():
num_list = [1,2,3,4,5]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_neg():
num_list = [3, 4, 8, -3]
obs = 3
exp = mean(num_list)
assert obs == exp
def test_mean_1234():
values=[1.,2.,3.,4.]
calc_mean= mean(values)
expected_mean=2.5
assert expected_mean==calc_mean
def test_neg():
num = [4, -3, 5]
obs = mean(num)
exp = 2
assert obs == exp
def test_zero():
num = [4, 0, 6]
obs = mean(num)
exp = 3
assert obs == exp
def test_double(): num_list=[1,2,3,4] obs = mean(num_list) exp = 2.5 assert obs == exp
def test_zero():
num_list = [0., 2., 4., 6.]
obs = mean(num_list)
exp = 3
assert obs == exp
import statistics import mean
import sys
i = 0
a_numbers = []
for argv in sys.argv:
a_numbers.append(sys.argv[i])
i = i+0
del a_numbers[0]
print("mean:" (mean(a_numbers))
def test_long():
big = 100000000
obs = mean(range(1,big))
exp = big/2.0
assert obs == exp
def test_long():
big = 1000000
obs = mean(range(1, big))
exp = big / 2.0
assert_almost_equal(obs, exp)
def test_ints():
num = [4, 3, 6]
obs = mean(num)
exp = 4
assert obs == exp
def sSE(yhat,y):
ybar = mean(y)
sse = 0
for i in range(0,len(yhat)):
sse += (yhat[i]-ybar)**2
return sse
def test_negative():
nums = [-3, 0, 0]
obs = mean(nums)
exp = -1
assert obs == exp
def test_ints():
num_list = [2, 3, 4]
obs = 3
exp = mean(num_list)
assert obs == exp
def test_empty():
nums = []
obs = mean(nums)
assert math.isnan(obs)
def test_double():
# This one will fail in Python 2
num_list=[1,2,3,4]
obs = mean(num_list)
exp = 2.5
assert obs == exp
def test_mean_1234():
values = [1., 2., 3., 4.]
calc_mean = mean(values)
expected_mean = 2.5
assert expected_mean == calc_mean
def test_mean_1234():
num_list = [1,2,3,4]
calc_mean = mean(num_list)
expected_mean = 2.5
assert expected_mean == calc_mean
def test_ints():
num_list = [4, 5, 28, 3]
obs = mean(num_list)
exp = 10
assert obs == exp
def test_zero():
num_list = [0, 3, 3]
obs = mean(num_list)
exp = 2
assert obs == exp
def testZero():
nums = [0, 0, 0]
obs = mean(nums)
exp = 0
assert obs == exp
def test_ints():
num_list = [3, 4, 5]
obs = mean(num_list)
exp = 4
assert obs == exp
def test_ints():
num_list = [1,2,3,4,5]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_double():
# This one will fail in Python 2
num_list=[1,2,3,4]
obs = mean(num_list)
exp = 2.5
assert obs == exp
def test1():
list = [0, 4, 5]
obs = mean(list)
exp = 3
assert obs == exp
def testNeg():
nums = [-1, -1, -1]
obs = mean(nums)
exp = -1
assert obs == exp
def test_zero():
num_list=[0.,2.,4.,6.]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_mean_1234():
num_list = [1, 2, 3, 4, 5]
calc_mean = mean(num_list)
expected_mean = 3
assert expected_mean == calc_mean
def testInts():
nums = [4, 5, 28, 3]
obs = mean(nums)
exp = 10
assert obs == exp
def test():
list = [3, 4, 5]
obs = mean(list)
exp = 4
assert obs == exp
def test_double():
num_list = [1, 2, 3, 4]
obs = mean(num_list)
exp = 2.5
assert obs == exp
def test_zero():
num_list = [3, 0, 5, 4]
obs = 3
exp = mean(num_list)
assert obs == exp
def test_mean_12345():
num_list=[1,2,3,4,5]
calc_mean=mean(num_list)
expected_mean=3
assert expected_mean == calc_mean
