function filterAllow* not recognized

Hi,

I would like to filter CAN Messages with the command filterAllowOnly, but if I type it in the command window it says

filterAllowOnly

Unrecognized function or variable 'filterAllowOnly'.

I use R2022a with the Vehicle Network Toolbox installed. My College on version 2021b experiences the same issue. Are we missing something? Otherwise i would open a bug report on this.

Best Regards and thanks in advance,

Tobi

[Tobias Friebel]

Thanks for explaining! I was mislead by the Error Output and should have read the manual more carefully.

In addition for others who may stumble across this question:

To filter exisiting messages instead of a channel the canSignalTimetable function can be used.

Thanks again,

Tobi

Answer 1

[Steven Lord]

There are two filterAllowOnly functions in Vehicle Network Toolbox.

The first filterAllowOnly function requires two inputs, the first of which must be a J1939 channel object created by the j1939Channel function. Your call above specifies 0 input arguments, which does not satisfy the requirements of this function.

The second filterAllowOnly function requires two or three input arguments, the first of which must be a CAN channel object created by a function like canChannel. Your call above does not satisfy the requirements of this function either.

This is not a bug.

Build the appropriate channel object and pass it into filterAllowOnly along with the compatible second and/or third inputs (since you mentioned a CAN channel, that would be the name or IDs and types.)

Answer 2

[Walter Roberson]

That is not a general function. It is a method that applies only for https://www.mathworks.com/help/vnt/ug/canchannel.html canChannel objects. It can only be found if you pass in a canChannel