我想将4个PNG图像组合成一个PNG文件.我知道谁将它们与Image.paste方法结合起来,但我无法创建保存输出文件!实际上,我想要一个*m空的PNG文件,并用来组合我的图像.我需要指定文件大小,如果不是我不能使用粘贴方法.
假设a = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6]和s = [3, 3, 9, 3, 6, 3].我在寻找重复的最佳方式a[i]正好s[i]次,然后在形式的扁平化阵列b = [0.1, 0.1, 0.1, 0.2, 0.2, 0.2, 0.3, 0.3, 0.3, 0.3, ... ].
我想尽快做到这一点,因为我必须多次这样做.我正在使用Python和numpy,数组被定义为numpy.ndarray.我四处搜索并了解了哪些repeat,tile并且column_stack可以很好地使用它来重复每个元素n次,但我想重复它们中的每一个不同的时间.
一种方法是:
a = hsplit(a, 6)
for i in range(len(a)):
a[i] = repeat(a[i], s[i])
a = a.flatten()
我想知道是否有更好的方法来做到这一点.
I'm trying to provide an interface — through a config file — for my users to choose a distribution for some of the parameters that they are using. I would like to use STL random number generator algorithms for this purpose.
Let's assume that my program reads a JSON from a command line. For the JSON provided below, the program needs to realize that it should generate a random number from the normal distribution with given mean and standard variation. …