2015-04-06 回答

數據顯示格式可以由命令：vpa，format等改變另外還有fprintf格式與c基本一致，format rational最接近的有理數，format long 14位小數，format恢復。vap(c,6)設置c為6位小數。fprintf(‘%20.6f’，c)。

至于你的問題，你可以使用vap(最好)也可以使用format long eng，如果問題允許你也可以事先處理數據使之再適合范圍。推薦你使用help，其中有詳細介紹。

format命令參數：

short

scaled fixed point format, with 4 digits after the decimal point. for example, 3.1416.

long

scaled fixed point format with 14 to 15 digits after the decimal point for double; and 7 digits after the decimal point for single. for example, 3.141592653589793.

short e

floating point format, with 4 digits after the decimal point. for example, 3.1416e+000.

long e

floating point format, with 14 to 15 digits after the decimal point for double; and 7 digits after the decimal point for single. for example, 3.141592653589793e+000.

short g

best of fixed or floating point, with 4 digits after the decimal point. for example, 3.1416.

long g

best of fixed or floating point, with 14 to 15 digits after the decimal point for double; and 7 digits after the decimal point for single. for example, 3.14159265358979.

short eng

engineering format that has 4 digits after the decimal point, and a power that is a multiple of three. for example, 3.1416e+000.

long eng

engineering format that has exactly 16 significant digits and a power that is a multiple of three. for example, 3.14159265358979e+000.

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