title: I have a 6000 character images. And i want to create an array of all images
body: <p>i want to create a mat file. Through which i can train my neural network for OCR.  I have 6200 images of size 30*30 .How can i create an array of all images. size will be 6200*30*30 and then want to unroll image into 6200*900. plz help
  currently m able to read the files but not able to process my operations</p>