Delete file on target hardware
You can delete a file on the Raspberry Pi™ hardware.
You can delete multiple files on the Raspberry
using a wildcard character,
You can delete files on the Raspberry Pi hardware when connected to it from MATLAB® Online™. To use your hardware from MATLAB Online, follow the instructions in Connect to Raspberry Pi Hardware Board in MATLAB Online.
When connected to your hardware from MATLAB
Online, the default working directory is
/home/matlabrpi, instead of
/home/pi. This is the only directory you can delete
files from. Delete a file in
/home/matlabrpi by using the
file name as an input argument.
You can connect to the camera board from the MATLAB software, take a photograph, and record video.
Create a connection from the MATLAB software to the Raspberry Pi hardware.
mypi = raspi
Create a connection,
mycam, from the MATLAB software to the camera board, and set the image resolution. The connection
displays the camera board properties.
mycam = cameraboard(mypi,'Resolution','1280x720')
mycam = Cameraboard with Properties: Name: Camera Board Resolution: '1280x720' (View available resolutions) Quality: 10 (1 to 100) Rotation: 0 (0, 90, 180 or 270) HorizontalFlip: 0 VerticalFlip: 0 FrameRate: 30 (2 to 30) Recording: 0 Picture Settings Brightness: 50 (0 to 100) Contrast: 0 (-100 to 100) Saturation: 0 (-100 to 100) Sharpness: 0 (-100 to 100) Exposure and AWB ExposureMode: 'auto' (View available exposure modes) ExposureCompensation: 0 (-10 to 10) AWBMode: 'auto' (View available AWB modes) MeteringMode: 'average' (View available metering modes) Effects ImageEffect: 'none' (View available image effects) VideoStabilization: 'off' ROI: [0.00 0.00 1.00 1.00] (0.0 to 1.0 [top, left, width, height])
Import and display a sequence of 10 snapshots on your computer.
for ii = 1:10 img = snapshot(mycam) imagesc(img) drawnow end
If the image is upside down, change its orientation.
mycam.Rotation = 180
You can use the same approach to change the values of other
Record a 60 second video.
Stop the recording immediately.
Copy the video from the board to your computer.
Delete the video file from the hardware to free up space.
filename— File to delete
File to delete, specified as a string. You can delete a file on the Raspberry
Pi hardware. When you specify the file name, you can use path
information and wildcards. In MATLAB
Online, you can only delete files in the default working directory,