Model Validation

[Debbie Lam]

Hello,

I've read a few articles regarding model validation. Overall, validation is determined on the model's accuracy, generalization, specificity, and compactness.

May I know is there any functions available in Scalismo to calculate the above values?

Thank you in advance.

[Marcel Luethi]

Dear Debbie

You find corresponding functions in the class ModelMetrics

https://github.com/unibas-gravis/scalismo/blob/master/src/main/scala/scalismo/statisticalmodel/dataset/ModelMetrics.scala

For computing the compactness, you can just sum up the first n eigenvalues:

model.gp.klBasis.take(n).map(_.eigenvalue).sum

Best regards,

Marcel

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[Debbie Lam]

Hello Marcel,

I'm currently using Scalismo with Scala-cli and VSCode. After I run the code for model validation, nothing was shown in the Scaliso platform.  May I know what is the output and where is it found for the validation functions? 

Thank you.

[Marcel Luethi]

The methods just return the metric values. No visual output is produced. Rather, you should print these values out using the println function.

Best regards,

Marcel

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[Debbie Lam]

Hello Marcel,

I wasn't able to obtain anything in the "OUTPUT" window in VSCode (see attachment photo). May I know did I look at the wrong place?

[Marcel Luethi]

Hi Debbie

When you run the code using the run button of VSCode, the output appears in the Debug Console and not the output window.

Best regards,

Marcel

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[Marcel Luethi]

Hi Debbie

I cannot tell you what is happening. Your code looks correct and it it runs the output should appear.

You could maybe just try to run it using scala-cli instead of using the run button in vscode. For this open a terminal and run the command scala-cli run YOUR_SCALA_FILE.scala

You should see then output in the terminal from which you called scala-cli. If not, something is wrong with your program.

Best regards,

Marcel

On Wed, Apr 13, 2022 at 12:56 PM Debbie Lam <xin9...@gmail.com> wrote:

Hi Marcel

Although my code ran completely fine and the output in Scalismo is within expectation, the debug console is completely blank throughout the entire process. May I know what may be the issue?

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