[Dan Damelin]

Let us know if you have questions about the sampler and it’s function to do the kind of work you are interested in. We are also going to be releasing a plugin soon called Testimate, which will make inferential statistical calculations more possible with CODAP as well.

[Dan Damelin]

Yes, what Bill suggests will fix it. For values that are considered “categorical” which in this case row number is plotted that way, you can drag the categories to be in whatever order you like. So, you can drag the row numbers to reorder them. It’s been on my list for a long time to update the example dataset doc we publicly provide. Maybe it’s time I move that up in priority. 🙂

[Dan Damelin]

Hi Itai,I’m not sure what you are asking in #1 above. You can’t drag individual cells around in a table, only entire columns/attributes.Regarding #2, we have another application called SageModeler which allows you to create system models while also taking advantage of CODAP’s data handling features. Please check out https://sagemodeler.concord.orgFor that specific model https://sagemodeler.concord.org/app/#shared=https%3A%2F%2Fcfm-shared.concord.org%2FVoyxk8c8LL3elY55KJQg%2Ffile.json 

[Dan Damelin]

Itai, check out this screencast of me executing the steps above. Does this help?

[Dan Damelin]

Thank you for spending the time to document these issues.Could you attach the file you referred to (and any others that show the issues you mention about the graphs)? You could also make share links to files, which might be even easier to include in a message.

[Dan Damelin]

CODAP has the ability to generate a normal curve fit to your data.To see this make a univariate plot of the values you are interested in. Then click on the measures tool (the ruler icon) to bring up the measures palette. Here you can click on “measures of spread” and click the box for “normal curve.” It would at least let your students see if their data visually fit a normal distribution.

[Dan Damelin]

HI Itai,Here is a link to a CODAP document that does what you want. To make this I:

• imported you csv into CODAP
• used the Transformers plugin to create a new column (time from start), and another column called volume, so that the columns headers for seconds became values in the time column, and the volume measurements were moved into a volume column.
• I then used the Transformers plugin to make an editable copy (the first table made by the plugin was not editable)
• Then, by dragging “treatment” to the left I grouped by that attribute.
• I then made a subgroup by “time”
• Then a new column that calculates the average volume per time-subgroup, which is already grouped by treatment.
• Then made a graph, dragging “time” to the x-axis, “average vol” to the y-axis and dropping “treatment” in the middle to color the dots and chose to show lines using the ruler tool panel.

[Dan Damelin]

Andrew,One quick way to do recode the categorical variable the way Bill described above is to:

1. Drag the attribute to the far left to group by those categories
2. Fill in the empty cell with whatever you want to designate “missing”.
3. Drag it back to where it was before.

Click to see a video example.

[Dan Damelin]

Because you want to give a different sample to each group, I would recommend option 2 that Bill mentioned above, because you can generate as many samples as you want by clicking the start button multiple times.

[Dan Damelin]

This issue has been answered here: https://codap.concord.org/forums/topic/regression-line-broad-boundaries/#post-8073

But I had another couple of ideas:

1. You could open the graph in the draw tool (see camera icon) and annotate it any way you like.

2. You could put the image online and import it, then make the graph transparent in the style palette (paint brush), adjust the scale of the graph using the axes, and overlay the graph on your image.

See CODAP doc shared here.

[Dan Damelin]

There is no way to show two lines on either side of the regression line, but you could check the box next to “Show Confidence Bands” and this will show two lines on either side of the regression line and indicate the confidence of the fit.You can add one arbitrary line using the “Movable Line” but that likely won’t help with your issue.

[Dan Damelin]

Hi Itai,You can’t directly embed a video in CODAP from a local file. The video needs to be hosted online. If you have a direct link to the video file hosted on a web server, you can use that with these instructions for embedding a webpage in CODAP. You could also make a web page with the video embedded and use the URL to where that page is hosted online.For YouTube videos you can click on the “share” option and get an embed code. This is html for embedding the video in a webpage, so you would have to create a webpage and add the YouTube video to that page. Then get the URL to where that page is hosted and use that with the instructions above.

Another option for embedding the YouTube video more directly is to click on the “share” link for the video and within the embed code mentioned above there is a src=”…link to the video…” part of that code. If you use the link from here you can directly embed that as a webpage in CODAP using the instructions above.

[Dan Damelin]

Is this what you were looking for:https://codap.concord.org/releases/latest/static/dg/en/cert/index.html#shared=https%3A%2F%2Fcfm-shared.concord.org%2F1IzLeA9b5mpvWMbtY4q9%2Ffile.json

I changed the “value” to “categorical”, made the graph, and then set it to have a “bar for each point.”

See relevant help pages:

https://codap.concord.org/help/work-tables/edit-attribute-properties

https://codap.concord.org/help/work-graphs/plot-numeric-value-bar

[Dan Damelin]

I tried resizing the table and scrolling the table to the left, then updating my shared view, which seems to have worked for me.

https://codap.concord.org/app/static/dg/en/cert/index.html#shared=https%3A%2F%2Fcfm-shared.concord.org%2FpumJNdP4eXETw89EAGHi%2Ffile.json

One thing I noticed is that this is a huge CODAP file (60 MB). Given there are only 30 cases this must mean the geoJSON boundary definitions are extremely detailed. If you have the original geoJSON file you might try using MapShaper to reduce the complexity of the boundaries, greatly reducing the size of your CODAP file, and the time it takes to load.

https://mapshaper.org/

[Dan Damelin]

The yellow highlighting is there because the data for each of those columns is using a formula to populate the cells for that attribute. You can eliminate the highlighting by clicking on the attribute name and selecting “Delete formula (keeping values)”. If you do this for all of those merged columns you can then delete the other table. In fact, it might be preferable to delete that other table if you have the geoJSON boundary definitions in both tables, as the maps will plot both sets of duplicate boundaries.

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