Why my graph only contain 4 lines instead of 6 lines

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Dan
Dan 2023-6-6
评论： Dan 2023-6-6
I defined a function which is calculate_pi, and using 6 different method to approxiamt the value of pi. The compute answer is correct, but when I use the answer to calculate the error between the value of pi in matlab, and plot the error in graph, it only shows 4 lines instead of 6 lines. I don't know why, can somebody help me? I appreciate that!

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Nathan Hardenberg
编辑：Nathan Hardenberg 2023-6-6
Check if your err-array for "left-hand" and "right-hand" has values in it. If thy are NaN, it does not plot a line, but no error is thrown
-- EDIT -- (after calculate_pi() Code)
Three of your methods result in the same graph ("left_end", "right_end" and "trapezoidal"). Thats why you are only able to see four graphs. I plotted with different linestyles to make it more obvious.

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