Python: Removing a range of numbers from array list

Question

Im having issues removing elements from a range a through b from an array list. The solutions ive searched online seem to only work for individual elements, adjacent elements and or elements that are whole numbers. Im dealing with float numbers.

self.genx = np.arange(0, 5, 0.1)

temp_select = self.genx[1:3] #I want to remove numbers from 1 - 3 from genx
print(temp_select)
self.genx = list(set(self.genx)-set(temp_select))
print(self.genx)
plt.plot(self.genx,self.geny)

However I get the following in the console and this is because im subtracting floats rather than whole numbers so it literally subtracts rather than removing which is what it would do if dealing with whole numbers:

genx: [ 0.0 , 0.1 , 0.2 , 0.3 , 0.4 , 0.5 , 0.6 , 0.7 , 0.8 , 0.9 , 1.0, 1.1 , 1.2 , 1.3 , 1.4 , 1.5 , 1.6 , 1.7 , 1.8 , 1.9 , 2.0, , 2.1 , 2.2 , 2.3 , 2.4 , 2.5 , 2.6 , 2.7 , 2.8 , 2.9 , 3.0 , 3.1 , 3.2 , 3.3 , 3.4 , 3.5 , 3.6 , 3.7 , 3.8 , 3.9 , 4.0 , 4.1 , 4.2 , 4.3 , 4.4 , 4.5 , 4.6 , 4.7 , 4.8 , 4.9]

temp_select: [ 0.1 0.2]

genx(after subtracted): [0.0, 0.5, 2.0, 3.0, 4.0, 1.5, 1.0, 1.1000000000000001, 0.70000000000000007, 0.90000000000000002, 2.7000000000000002, 0.30000000000000004, 2.9000000000000004, 1.9000000000000001, 3.3000000000000003, 0.40000000000000002, 4.7000000000000002, 3.4000000000000004, 2.2000000000000002, 2.8000000000000003, 1.4000000000000001, 0.60000000000000009, 3.6000000000000001, 1.3, 1.2000000000000002, 4.2999999999999998, 4.2000000000000002, 4.9000000000000004, 3.9000000000000004, 3.8000000000000003, 2.3000000000000003, 4.8000000000000007, 3.2000000000000002, 1.7000000000000002, 2.5, 3.5, 1.8, 4.1000000000000005, 2.4000000000000004, 4.4000000000000004, 1.6000000000000001, 0.80000000000000004, 2.6000000000000001, 4.6000000000000005, 2.1000000000000001, 3.1000000000000001, 3.7000000000000002, 4.5]

Take note that square brackets [] are used for index based access. self.genx[1:3] means "first and second element of self.genx". This is totally unrelated to the value store at these indices. — MisterMiyagi
– MisterMiyagi, Commented Jul 28, 2016 at 8:11

Srdjan Grubor · Accepted Answer · 2013-10-13 19:26:24Z

1

I didn't test this but you should be able to do something like the following:

self.genx = [ item for item in self.genx if not range_min < item < range_max ]

answered Oct 13, 2013 at 19:26

Srdjan Grubor

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Potion Over a year ago

This worked nicely! However it would round the numbers. So if I set min=2, max =4, genx is: [0.0, 0.10000000000000001, 0.20000000000000001, 0.30000000000000004, 0.40000000000000002, 0.5, 0.60000000000000009, 0.70000000000000007, 0.80000000000000004, 0.90000000000000002, 1.0, 1.1000000000000001, 1.2000000000000002, 1.3, 1.4000000000000001, 1.5, 1.6000000000000001, 1.7000000000000002, 1.8, 1.9000000000000001, 2.0, 4.0, 4.1000000000000005, 4.2000000000000002, 4.2999999999999998, 4.4000000000000004, 4.5, 4.6000000000000005, 4.7000000000000002, 4.8000000000000007, 4.9000000000000004] Fixable?

Chu · Accepted Answer · 2016-07-28 08:07:24Z

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self.genx = [ item for item in self.genx if not range_min <= item <= range_max ]

Is this what you want??

answered Jul 28, 2016 at 8:07

Chu

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