# NormalQuantilePlot Error

David Klapheck shared this problem 2 years ago
Solved

NormalQuantilePlot command states "Points are formed by plotting data values on the x axis against their expected normal score (Z-score) on the y axis."

But when I plot data, the normal quantile stops plotting after so many points, then starts outputing single values instead of points.

See attached example.

Thanks, I can see the problem now so we'll try and get that fixed.

As a workaround, putting UpdateConstruction() in the On Update script for the slider might help...

1

`starts outputing single values instead of points.`
What do you mean by that exactly? Perhaps you can post a screenshot showing the problem.

1

It has something to do with using the command on a list that grows with a slider.

You can duplicate my error on https://www.geogebra.org/gr... using the t slider.

mx={7.11111,7.07407,7.11111,6.40741,6.7037,6.03704,6.92593,7.03704,6.85185,6.25926,7.22222,6.62963,7.11111,7.51852,6.59259,7.40741,6.62963,6,7.33333,6.81481,7.2963,6.92593,6.07407}

NormalQuantilePlot(mx)={(6, -1.88541), (6.03704, -1.46099), (6.07407, -1.20135), (6.25926, -1.00434), 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214}

1

It has something to do with using the command on a list that grows with a slider.

You can duplicate my error on https://www.geogebra.org/gr... using the t slider.

mx={7.11111,7.07407,7.11111,6.40741,6.7037,6.03704,6.92593,7.03704,6.85185,6.25926,7.22222,6.62963,7.11111,7.51852,6.59259,7.40741,6.62963,6,7.33333,6.81481,7.2963,6.92593,6.07407}

NormalQuantilePlot(mx)={(6, -1.88541), (6.03704, -1.46099), (6.07407, -1.20135), (6.25926, -1.00434), 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214}

1

It has something to do with using the command on a list that grows with a slider.

I keep trying to upload a screen shot but can't.

You can duplicate my error on https://www.geogebra.org/gr... using the t slider.

mx={7.11111,7.07407,7.11111,6.40741,6.7037,6.03704,6.92593,7.03704,6.85185,6.25926,7.22222,6.62963,7.11111,7.51852,6.59259,7.40741,6.62963,6,7.33333,6.81481,7.2963,6.92593,6.07407}

NormalQuantilePlot(mx)={(6, -1.88541), (6.03704, -1.46099), (6.07407, -1.20135), (6.25926, -1.00434), 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214, 3.74214}

1

Sorry, I still don't see what the error is - what is wrong exactly?

You can email the screenshot to support@geogebra.org if that's helpful

1

Sorry for the duplicate posting. When I posted it would show my comment sent but then resolve back to the editing window "Leave a Comment". Do you see the snapshots in my first two comments, where most of the points are missing on the normal quantile plot as opposed to the dot plot. This happens when I select the animate t slider. It happens while using graphing calculator on the browser and to a lesser extent on my program graphing calculator on my laptop.

1

Thanks, I see what you mean about your screenshot. It works OK for me though.

Which browser are you using?

1

Chrome.

1

Thanks, I can see the problem now so we'll try and get that fixed.

As a workaround, putting UpdateConstruction() in the On Update script for the slider might help...

1

Fixed for v597 (next release)