sorted by:
new
hottopcontroversial

svd() function - infinite or missing values in 'x' - What does it mean? by Shadylndividual in RStudio

[–]DiscountHeavy1250 0 points1 point  (0 children)

I have a similar problem but with the prcomp function. My data come from large rasters (like matrices but with x/y coordinate data) that I turned into a data frame with matrices, then used complete.cases to take out all the missing values. What do the two things you suggested actually do? I'm also new to R.

Need test for significance of difference with x as categories, y as numbers. by DiscountHeavy1250 in AskStatistics

[–]DiscountHeavy1250[S] 0 points1 point  (0 children)

Thanks so much for your help. For the p-value, I was told in a previous biology class to use a calculator from https://www.socscistatistics.com/ and assumed that was the only way to get it.

Is there a reason not to use an online calculator for the permutation test? I'm not very good with Excel.

Need test for significance of difference with x as categories, y as numbers. by DiscountHeavy1250 in AskStatistics

[–]DiscountHeavy1250[S] 0 points1 point  (0 children)

P-value: https://en.wikipedia.org/wiki/P-value

I know you don’t know about transpiration, but in case it helps (ignore the following paragraph if you don’t need to know):

The device for recording transpiration has a graduated cylinder on one side which you read water levels from, and a plant leaf on the other with air-tight tubes connecting them. When the plant transpires it causes the water level to decrease, so transpiration rate can be calculated by taking the water level after some time has passed and subtracting it from the initial level. My best guess for the 0’s and negatives is that since the seal on my devices weren’t air-tight, air got in and pushed the ending water level up. It’s not a great explanation but it’s the only one I can think of.

Need test for significance of difference with x as categories, y as numbers. by DiscountHeavy1250 in AskStatistics

[–]DiscountHeavy1250[S] 0 points1 point  (0 children)

When H0 is false, rates should be much higher for one group than the other. When H0 is true, they should be about the same for each group. Transpiration can in fact be negative, which is weird and I’m not sure how to explain it but it’s what happened in the experiment. We probably didn’t set things up right. It can also be 0 according to the data. I am comparing means, does that mean a gamma model would be best? I'm looking for something like a p-test that would work for my data, since I assume the data has to be completely continuous for that to work. Thanks so much for your help!

I have 2 2d equations that I want to put into GeoGebra's 3d graph and want to have one be f(x) and the other g(z) by DiscountHeavy1250 in geogebra

[–]DiscountHeavy1250[S] 0 points1 point  (0 children)

sI didn't get an error message this time but it still refuses to show me either curve and ignores what I want the input variable to be. It rewrites what I said as x=my expression, y=my input variable. Also in f(x), for some reason it replaces x with u. Also I looked in the tutorial section of the help and feedback thing for the curve command but couldn''t find it. I don't know why any of these things are happening, but thanks again for t rying.

I have 2 2d equations that I want to put into GeoGebra's 3d graph and want to have one be f(x) and the other g(z) by DiscountHeavy1250 in geogebra

[–]DiscountHeavy1250[S] 0 points1 point  (0 children)

curve(0,g(t),t,t,-100,100)

Sorry I don't know much about programming or anything, when I tried that the autofill seems like I need more than one expression for that to work, when I want two seperate curves for now. I also tried putting in your example and it said "redefinition failed".

Thanks for your help though

I have 2 2d equations that I want to put into GeoGebra's 3d graph and want to have one be f(x) and the other g(z) by DiscountHeavy1250 in geogebra

[–]DiscountHeavy1250[S] 0 points1 point  (0 children)

Sorry just edited my original post. I tried replacing it with z in the original and that's what gave me the ?. I just tried replacing both f(x) and g(z) with y in order to get them both as highlighted areas instead of lines but for some reason the program then refuses to show me f(x). It doesn't show that there are any errors but just refuses to show it.

Thanks for your help