advanced capstone project 1.4 - KX Learning Hub

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advanced capstone project 1.4

Posted by masmail on April 17, 2024 at 11:24 am
I’m getting a “rank: Invalid rank or valence (parameter count)” when running this code for 1.4. everything seems to be fine apart from the last line 🤷‍♂️
```
eventData:select from event where date=2020.01.02
sensorData:select from sensor where date=2020.01.02
lap:.f1.createLapTable[eventData;sensorData];
f1DbPath:`:./f1/;
lap:update `sym$sensorId from lap;
.Q.dpft[f1DbPath;lap;2020.01.02;lap;sensorId];
```
megan_mcp replied 7 months, 1 week ago 2 Members · 1 Reply
1 Reply

megan_mcp

Administrator
April 17, 2024 at 11:52 am
Hi @masmail

I believe this error is due to the way you structured your .Q.dpft function.

If you take a look at the screenshot provided you will see that this namespace only accepts 4 arguments;
- d is a directory handle
- p is a partition of a database
- f is a field of the table named by t below
- t the name (as a symbol) of a simple table whose columns are vectors or compound lists
The first two parameters are correct [f1DbPath;2020.01.02, ..] however you need to take a look at the order of your second two.

Let me know if this helps!

Thanks,

Megan

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