# Logarithmic Slider with Decorator in Python Plugin
**URL:** https://discourse.paraview.org/t/logarithmic-slider-with-decorator-in-python-plugin/7655
**Category:** Development
**Tags:** python
**Created:** [July 20, 2021, 5:44pm UTC](https://discourse.paraview.org/t/logarithmic-slider-with-decorator-in-python-plugin/7655 "2021-07-20T17:44:47Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Jared\_Blanchard](https://discourse.paraview.org/u/Jared_Blanchard)
#### Post date: [July 20, 2021, 5:44pm UTC](https://discourse.paraview.org/t/logarithmic-slider-with-decorator-in-python-plugin/7655/1 "2021-07-20T17:44:47Z")
So far, I’ve only seen decorators that allow for linear scale slide bars. Is there a logarithmic scale slide bar?
For example, I have a slide bar to scale a sphere. The growth rate is very high on the left side of the slide bar, and slows down as I reach the right side (1000). I would love to have a linear growth rate (hence a logarithmic slider). Any ideas?
```auto
@smproperty.doublevector(name="R1Scale", default_values=1)
@smdomain.doublerange(min=1, max=1000)
def SetR1Scale(self, x):
self.prim.SetRadius(x*self.R1)
self.Modified()
```
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [August 3, 2021, 1:50pm UTC](https://discourse.paraview.org/t/logarithmic-slider-with-decorator-in-python-plugin/7655/2 "2021-08-03T13:50:38Z")
There is no logarithmic slider available in ParaView, I’m afraid.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [August 3, 2021, 2:01pm UTC](https://discourse.paraview.org/t/logarithmic-slider-with-decorator-in-python-plugin/7655/3 "2021-08-03T14:01:52Z")
This would be a nice simple addition though.
---
### Author:  [@Jared\_Blanchard](https://discourse.paraview.org/u/Jared_Blanchard)
#### Post date: [August 3, 2021, 2:23pm UTC](https://discourse.paraview.org/t/logarithmic-slider-with-decorator-in-python-plugin/7655/4 "2021-08-03T14:23:17Z")
Yes, I think it would be useful for a lot of situations. I made do with the following code.
```auto
@smproperty.doublevector(name="Radius Scale 10ˣ", default_values=0) # semimajor axis
@smdomain.doublerange(min=0, max=5)
def SetRadiusScaling(self, R):
self.radius_scale = 10**R
self.compute_sphere()
self.Modified()
```
This gives me a slider that will scale my sphere’s radius by 10^x. I could use `np.exp(R)` as well.