close

[Solved] TypeError: ufunc ‘multiply’ did not contain a loop with signature matching types dtype(‘S32’) dtype(‘S32’) dtype(‘S32’)

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error TypeError: ufunc ‘multiply’ did not contain a loop with signature matching types dtype(‘S32’) dtype(‘S32’) dtype(‘S32’) in python. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How TypeError: ufunc ‘multiply’ did not contain a loop with signature matching types dtype(‘S32’) dtype(‘S32’) dtype(‘S32’) Error Occurs?

Today I get the following error TypeError: ufunc ‘multiply’ did not contain a loop with signature matching types dtype(‘S32’) dtype(‘S32’) dtype(‘S32’) in python.

How To Solve TypeError: ufunc ‘multiply’ did not contain a loop with signature matching types dtype(‘S32’) dtype(‘S32’) dtype(‘S32’) Error ?

  1. How To Solve TypeError: ufunc 'multiply' did not contain a loop with signature matching types dtype('S32') dtype('S32') dtype('S32') Error ?

    To Solve TypeError: ufunc 'multiply' did not contain a loop with signature matching types dtype('S32') dtype('S32') dtype('S32') Error So what happens is that you try to multiply a string with a float, something like y="3" * x - 0.5 * "3" *x**2, which is not defined.

  2. TypeError: ufunc 'multiply' did not contain a loop with signature matching types dtype('S32') dtype('S32') dtype('S32')

    To Solve TypeError: ufunc 'multiply' did not contain a loop with signature matching types dtype('S32') dtype('S32') dtype('S32') Error So what happens is that you try to multiply a string with a float, something like y="3" * x - 0.5 * "3" *x**2, which is not defined.

Solution 1

From the documentation of raw_input:

The function then reads a line from input, converts it to a string (stripping a trailing newline), and returns that.

So what happens is that you try to multiply a string with a float, something like y="3" * x - 0.5 * "3" *x**2, which is not defined.

The easiest way to circumvent this is to cast the input string to float first.

x = np.linspace(0., 9., 10)
a = float(raw_input('Acceleration ='))
v = float(raw_input('Velocity = '))
y=v*x-0.5*a*x**2

Mind that if you’re using python 3, you’d need to use inputinstead of raw_input,

a = float(input('Acceleration ='))

Solution 2

I faced this problem recently, change the dtype of x to something specific by doing:

x = np.asarray(x, dtype='float64')

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

Also, Read