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import numpy as np
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def x1_2(problemIndex): # 程序给出任一函数 y=f(x)计算x=1到1000的y值，赋值给xyMap
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# shape = [1000,2] #x值为1到1000，y为其对应函数值
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xyMap = np.random.rand(1000, 2)
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if problemIndex == 1:
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for x in range(1, 1001):
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xyMap[x - 1][0] = x # xyMap序号为0-999
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xyMap[x - 1][1] = np.sin(x)
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return xyMap
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elif problemIndex == 2:
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for x in range(1, 1001):
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xyMap[x - 1][0] = x
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xyMap[x - 1][1] = np.cos(x)
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return xyMap
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elif problemIndex == 3:
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for x in range(1, 1001):
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xyMap[x - 1][0] = x
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xyMap[x - 1][1] = np.tan(x)
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return xyMap
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elif problemIndex == 4:
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for x in range(1, 1001):
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xyMap[x - 1][0] = x
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xyMap[x - 1][1] = x * 2 + 2
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return xyMap
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if __name__ == '__main__':
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print(x1_2(4)[:50])
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