To change the output dimension of a block

I am currently using the Mobile Robotics Training Toolbox to create simulink code for line tracer using reinforcement learning.

But there's an error now.

How do I change the output dimension of the line sensor block in the mobile robotics training library?

This is the error that appears below.

[Walter Roberson]

Does the code need four consecutive line sensor simulation readings, or does the code need a single line sensor simulation reading to be an array with four elements?

[Fangjun Jiang]

The message says the mismatch happened between the two "Reshape" blocks. Why do you have two "Reshape" blocks in series? How do you plan to provide the "observation" (size 4) input of the "RL Agent" from the "Line Sensor Simulation" (size 1)?

[hh]

In line sensor simulations (size 1), we are having trouble understanding that dimensions are not appropriate to provide "observation" (size 4) inputs to "RL agents". So I think I connected the Resape block without knowing it well.

[hh]

Perhaps a single-line sensor simulation reading is needed.

Answer 1

[Walter Roberson]

If you need groups of four sensor readings to become the input, then use a buffer block.

However I suspect that instead you need either four different sensors or a sensor that provides four output values (for example x y z signal-strength)