将数据帧转换为二维数组

Question

I have a data-frame of size (140000,22) dimensions.

i have to create 2d array of equal dimensions to pass it into convolution neural network .

Can you please guide how to transform on this dataframe

Answer 1

You just need to call .values on the DataFrame.

If for example your dataframe is called df , then you can pass df.values to your convolutional neural network.

Answer 2

Use arr = df.to_numpy()

See: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.to_numpy.html

It will create a 2d array where each row is the inner array.

[[row1],
 [row2],
 [row3]...
 [row n]]

To turn it into a 2d array where each column is the inner array, use transpose:

arr = np.transpose(arr)

[[all_data_in_col_1],
 [all_data_in_col_2],...
 [all_data_in_col_n]]