Search found 202 matches

by Ravi
Wed Jul 02, 2025 1:56 pm
Forum: Module development
Topic: Incorrect effect-size value in paired t-test
Replies: 8
Views: 75360

Re: Incorrect effect-size value in paired t-test

So I looked into the calculation of the cohen's d in the paired t-test and I think it's being calculated correctly at the moment. If you look at https://github.com/jamovi/jmv/blob/aa1f56e6a9ec06a9d5d92bbed08cb956463250c1/R/ttestps.b.R#L16-L17 and https://github.com/jamovi/jmv/blob/aa1f56e6a9ec06a9d5...
by Ravi
Fri May 30, 2025 2:27 pm
Forum: Help
Topic: correlation plots
Replies: 1
Views: 18220

Re: correlation plots

Hi Oliver, The correlation matrix plots use the GGally R package in the background. To create the scatter plot with regression line the ggally_smooth function (see https://ggobi.github.io/ggally/reference/ggally_smooth.html ) is used. Here you can see that the interval around the regression line rep...
by Ravi
Wed Mar 26, 2025 9:03 am
Forum: Help
Topic: Inconsistency in scale calculations
Replies: 11
Views: 130732

Re: Inconsistency in scale calculations

Hi everybody, So first let me reply to the following: That's one way to look at it. But the way I see it, the only correct way to reverse-code is to base it on the theoretical, not the actual range of the data. For example, for -2 to 2 scale [Strongly Disagree, Disagree, Neutral, Agree, Strongly Agr...
by Ravi
Wed Feb 26, 2025 2:36 pm
Forum: Help
Topic: Ordinal Logistic Regression Model Comparisons
Replies: 1
Views: 66153

Re: Ordinal Logistic Regression Model Comparisons

Thank you for bringing this bug to our attention! I found where the problem was and fixed it in this Pull Request: https://github.com/jamovi/jmv/pull/427.
by Ravi
Wed Feb 19, 2025 11:24 am
Forum: Help
Topic: Histogram density graph
Replies: 7
Views: 78848

Re: Histogram density graph

It's strange that it previously didn't happen with the same file, as the library that we're using to make these plots (ggrides) hasn't changed in over a year. I looked into the issue and it indeed has to do with groups having 2 or fewer data points. However, I looked into the issue and it seems that...
by Ravi
Wed Dec 18, 2024 12:09 pm
Forum: Help
Topic: Bug in correlation heatmap?
Replies: 4
Views: 47303

Re: Bug in correlation heatmap?

Hi! I found the issue: it’s due to how each analysis handles missing values. The correlation matrix uses pairwise deletion, while the reliability analysis applies listwise deletion. Since your dataset has a lot of missing data, listwise deletion removes far more cases than pairwise deletion. When I ...
by Ravi
Tue Aug 27, 2024 12:11 pm
Forum: Help
Topic: Can't Render Plot
Replies: 8
Views: 16487

Re: Can't Render Plot

So the problem was that we were passing on data objects in an inefficient way. I made an improvement to the library that should fix your issue (See https://github.com/jamovi/jmv/pull/412). Jonathon will push out an update for jamovi in the next couple of days.

Thank you for reporting this issue!
by Ravi
Tue Aug 27, 2024 8:42 am
Forum: Help
Topic: Can't Render Plot
Replies: 8
Views: 16487

Re: Can't Render Plot

Hi Jorge,

I'll have a look today to see what the problem is.

Cheers,
Ravi
by Ravi
Tue Jul 11, 2023 11:39 am
Forum: Help
Topic: Path diagram in CFA
Replies: 2
Views: 9186

Re: Path diagram in CFA

I think that probably the path between 7 and 8 is missing because the items overlap and therefore occlude the path that is drawn between them. I expect that if it were possible to increase the height of the plot (which is not possible in jamovi at the moment), the path between 7 and 8 would show up ...
by Ravi
Fri Jun 16, 2023 1:30 pm
Forum: Help
Topic: How can I fix these three issues? - Reliability Analysis & Principal Component Analysis
Replies: 6
Views: 13870

Re: How can I fix these three issues? - Reliability Analysis & Principal Component Analysis

Hi Deniz, Maurizio is indeed right that in your first example ("Car_Level 1", "Car2_Level 1", "Car3_Level 1", and "Car4_Level 1") only 1 row/case remains after deleting all the missing values (jamovi uses listwise deletion in the reliability analysis), and as ...