使用matplotlib和list从文件打印重复数据集

2024-05-15 17:30:29 发布

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这是我在这里的第一篇文章,所以我希望它进展顺利。在

我有一个格式的数据文件(大约2mb) 角度(空间)能量(空间)计数 角度(空间)能量(空间)计数 角度(空间)能量(空间)计数等

(这是粒子加速器运行170小时后记录的数据,因此文件很大)

角度从0开始,当能量增加到4500,然后 角度增加1,能量从0开始,上升到4500。这样重复 直到θ=255。在

我正在尝试创建一个程序来绘制计数与能级的关系,能级是x轴,计数是y轴。我试过很多办法,但都没有用。在

如果能在这方面给我任何帮助,我将不胜感激。在

我的代码张贴在下面。在



    import matplotlib.pyplot as plt
    import numpy as np
    import pylab
    from numpy import *
    from matplotlib.pyplot import *
    import math
    import sys
    import scipy.optimize
    """
    Usage
    ---------------
    Takes a file in the format of
    Theta |Rel_MeV |Counts
    97  4024    0
    97  4025    0
    97  4026    6
    97  4027    2

    and graphs it

    fileURL is the input for the file to put into the program
    txt_Title is the graph label
    """
    DEBUG = 1
    fileURL = './ne19_peaks_all.dat'
    txt_Title = 'Oxygen and Alpha Particle Relative Energy'
    MeV_divide_factor = 100
    ptSize = 5
    MarkerType = '+'
    MeV_max = 5000

    def main():
    # Read the file.
        f2 = open(fileURL, 'r')
        # read the whole file into a single variable, which is a list of every row of the file.
        lines = f2.readlines()
        f2.close()

        # initialize some variable to be lists:
        list_MeV = []
        list_counts = []
        for i in range(MeV_max):
            list_MeV.append(i)
            list_counts.append(0)

        # scan the rows of the file stored in lines, and put the values into some variables:
        for line in lines:
            p = line.split()
            MeV = float(p[1])/MeV_divide_factor
            count = float(p[2])
            list_counts[int(MeV)] += count

        x_arr = np.array(list_MeV)
        y_arr = np.array(list_counts)

        plt.plot(x_arr, y_arr, MarkerType)
        plt.title(txt_Title)
        plt.show()
        return 0

    def func(x, a, b):
        return a*x + b

    if __name__ == '__main__':
        status = main()
        sys.exit(status)


Tags: oftheinimportnp空间pltlist