I want to get the difference between the present number and the previous number for 1000 set of data from the plot.
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I have considered 10 random values from the set of 1000 values
X-axis values are as given a = [ -9.658 -9.321 -8.979 -8.742 -8.247 -7.291 -6.738 -7.439 -8.733 -8.596 ]
Y-axis values are as given b = [134 135 136 137 138 139 140 141 142 143 ]
I want to consider each set of values and find the difference between the number and its previous number for example a2-a1,a3-a2,a4-a3.... till a1000-a999. Depending upon these values if its increasing(difference is positive) or decreasing(difference is negative) or constant(difference is zero) I have to find out the threshold value of the given set. Please help me with the code.