Create a confusion matrix to display under tensorboard images.
Arguments
- path_tensorboard
- Path to tensorboard directory or - NULL. If- NULL, training not tracked on tensorboard.
- run_name
- Name of the run. Name will be used to identify output from callbacks. If - NULL, will use date as run name. If name already present, will add- "_2"to name or- "_{x+1}"if name ends with- _x, where- xis some integer.
- confMatLabels
- Names of classes. 
- cm_dir
- Directory that contains confusion matrix files. 
