Setting an array element with a sequence update#
Now, we will print the input, Then it will update the value in the list and got a value error. Then we will create a variable and use the library pandas dataframe to assign the values. Currently working on Repost : an application that selects and reposts your best content automatically on Social Media.In : x = arange ( 5 ) In : y = array (]) In : figure () Out: In : plot ( x, y ) - ValueError Traceback (most recent call last) in () -> 1 plot(x, y) /usr/lib64/python2.7/site-packages/matplotlib/pyplot.pyc in plot(*args, **kwargs) 2284 ax.hold(hold) 2285 try: -> 2286 ret = ax.plot(*args, **kwargs) 2287 draw_if_interactive() 2288 finally: /usr/lib64/python2.7/site-packages/matplotlib/axes.pyc in plot(self, *args, **kwargs) 3783 lines = 3784 -> 3785 for line in self._get_lines(*args, **kwargs): 3786 self.add_line(line) 3787 lines.append(line) /usr/lib64/python2.7/site-packages/matplotlib/axes.pyc in _grab_next_args(self, *args, **kwargs) 315 return 316 if len(remaining) 317 for seg in self._plot_args(remaining, kwargs): 318 yield seg 319 return /usr/lib64/python2.7/site-packages/matplotlib/axes.pyc in _plot_args(self, tup, kwargs) 292 x = np.arange(y.shape, dtype=float) 293 -> 294 x, y = self._xy_from_xy(x, y) 295 296 if mand = 'plot': /usr/lib64/python2.7/site-packages/matplotlib/axes.pyc in _xy_from_xy(self, x, y) 232 y = np.atleast_1d(y) 233 if x.shape != y.shape: -> 234 raise ValueError("x and y must have same first dimension") 235 if x.ndim > 2 or y. Setting an array Element with a sequence Pandas In this example, we will import the Python pandas module. Syntax: if nparray. we can fix this error by matching the data-type of value and array and then assign it as element of array. Here we have seen that this error is cause because we are assigning array as a element to array which accept string data-type. assign the values '4' and '5' to the first two positions of the array data 0:2 np.array( 4, 5) view updated array data array ( 4, 5, 3, 4, 5, 6, 7, 8, 9, 10) Notice that the first two values were changed in the array while all of the other values remained the same. It can be thrown under various circumstances. Means exactly what it says, you’re trying to cram a sequence of numbers into a single number slot. Jean-Christophe Lavocat's Picture Jean-Christophe Lavocat ValueError: setting an array element with a sequence. The Python ValueError: ValueError: setting an array element with a sequence. In order to help numpy to accept your vector… tell it it’s not a vector :īy doing this you change de dtype of your array, and it can accept even personnal classes. This is my own solution, so if helped you, I would be very glad :-D Instead, here is the solution I found after 4 hours looking everywhere on the web… finding nothing. Ok, then you can try to change the second value 0.5 to. This will cause the SVC () to throw an error ValueError Setting an element with a sequence. It doesn’t like the fact you give it table with different sizes. y np.array ( 1, 2, 2, 1) clf makepipeline (StandardScaler (), SVC (gamma'auto')) clf.fit (X, y) Here, the last element in the X array is of length 1, whereas all other elements are of length 2. The problem is that numpy is made to calculate vectors and arrays. I first didn’t notice the problem because I wasn’t using the ‘ array‘ constructor, but when I tried to append some value to my initial vector, I got the error : ValueError: setting an array element with sequence.Įven the simple construction : array(,0.5)]) would give the error. Means exactly what it says, youre trying to cram a sequence of numbers into a single number slot. With the basic syntax, it was impossible. ValueError: setting an array element with a sequence.
In my case I was trying to create an array of the following shape : You have struggled during hours and hours to understand why you got this damned error while compiling a complex array structure? I did.
World Hacks (Home) ☰ Menu Numpy error – ValueError: setting an array element with sequence The error ValueError: setting an array element with a sequence occurs when you attempt to set an element to a sequence that contains more than one item.
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