lambda dataframe code example

Example 1: pandas apply function to each row lambda

def EOQ(D,p,ck,ch):
    Q = math.sqrt((2*D*ck)/(ch*p))
    return Q
ch=0.2
ck=5
df['Q'] = df.apply(lambda row: EOQ(row['D'], row['p'], ck, ch), axis=1)
df

Example 2: lambda in pandas

Series.apply(lambda x: x**2) 
#x represent the cell value and x**2 is your function