Improving example text.

examples/ExampleGPT4Vision.m

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+%% Describe Images Using ChatGPT
+% This example shows how to generate image descriptions using the addUserMessageWithImages 
+% function. To run this example, you need a valid API key from a paid OpenAI API 
+% account.
+
+loadenv(".env")
+addpath('..') 
+%% Load and Display Image Data
+% Load the sample image from Wikipedia. Use the |imread| function to read images 
+% from URLs or filenames.
+
+image_url = 'https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg';
+im = imread(image_url);
+imshow(im)
+%% Generate Image Descriptions
+% Ask questions about the image with the URL. Select |gpt-4-vision-preview| 
+% model to create a chat object
+
+chat = openAIChat("You are an AI assistant.", ModelName="gpt-4-vision-preview"); 
+%% 
+% Create a message and pass the image url along with the prompt.
+
+messages = openAIMessages;
+messages = addUserMessageWithImages(messages,"What is in the image?", string(image_url));
+%% 
+% Generate a response. By default, the model returns a very short reponse. To 
+% override it, set |MaxNumTokens| to 4096 or lower. 
+
+[txt,~,response] = generate(chat,messages,MaxNumTokens=4096);
+if response.StatusCode == "OK"
+    wrappedText = wrapText(txt)
+else
+    response.Body.Data.error
+end
+%% Helper function
+
+function wrappedText = wrapText(text)
+    wrappedText = splitSentences(text);
+    wrappedText = join(wrappedText,newline);
+end
+%% 
+% _Copyright 2024 The MathWorks, Inc._