To be able to generate the image, you must inform gnuplot what format the graphicsfile should be and how it should be presented visually.
为了能够生成图像，必须告诉 gnuplot 图形文件应该采用什么格式以及应该如何显示。
2
This data might make sense in a Graphics Interchange Format (GIF) file but not in a JSP file.
此数据可能在图形交换格式(Graphics Interchange Format, GIF)文件中有意义，但在JSP文件中就没有意义了。
3
HTML lets you format text, add graphics, create links, input forms, frames and tables, etc., and save it all in a text file that any browser can read and display.