Shulou(Shulou.com)06/02 Report--

Statistical calculation and description of Pandas

Sample code:

Import numpy as npimport pandas as pddf_obj = pd.DataFrame (np.random.randn (5) 4), columns = ['axiao,' baked, 'cached,' d']) print (df_obj)

Running result:

A b c d0 1.469682 1.948965 1.373124-0.5641291-1.466670-0.494591 0.467787-2.0077712 1.368750 0.532142 0.487862-1.1308253-0.758540-0.479684 1.239135 1.0730774-0.007470 0.997034 2.669219 0.742070 commonly used statistical calculations sum, mean, max, min... Axis=0 statistics by column, axis=1 statistics by row

Skipna excludes missing values. Default is True.

Sample code:

Df_obj.sum () df_obj.max () df_obj.min (axis=1, skipna=False)

Running result:

A 0.605751b 2.503866c 6.237127d-1.887578dtype: float64a 1.46982b 1.948965c 2.669219d 1.073077dtype: float640-0.5641291-2.0077712-1.1308253-0.7585404-0.007470dtype: float64 commonly used statistical description describe produces multiple statistical data

Sample code:

Print (df_obj.describe ())

Running result:

A b c dcount 5.000000 5.000000 5.000000 5.000000mean 0.180305 0.106488 0.244978 0.178046std 0.641945 0.454340 1.064356 1.144416min-0.677175-0.490278-1.164928-1.57455625%-0.064069-0.182920-0.464013-0.08996250% 0.231722 0.127846 0.355859 0.19048275% 0.318854 0.463377 1.169750 0.983663max 1.092195 0.614413 1.328220 1.380601 commonly used statistical description method: the number of non-na values of count describe calculates summary statistics min for Series or each DataFrame column, Max maximum minimum value argmin, argmax minimum / maximum index position idxmin, index value of idxmax minimum / maximum index value quantile calculates the quantile of the sample (0 to 1) sum sum average mean mean median median (50% quantile) mad calculates the variance of the average absolute deviation of the std sample value the skewness of the standard deviation of the skew sample value (third moment) the kurtosis (fourth moment) of the kurt sample value the cumulative sum of cummin, cummin, and cummin of the cumsum sample value Cumulative maximum and minimum values of cummax sample values cumulative product of cumprod sample values diff calculation of first-order difference (useful for time series) pct_change calculation of percentage variation

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