可文本编辑, 保存运算过程, 可计算复数, 统计及绘图!

Notebook Calculator

Published by: 俊 姜

Description

输入长长的计算式时,修改非常方便 !
就像是在记事本中写算数题一样
可以计算复数、科学计算、函数作图、统计计算、积分计算 !
• It Supports the File Management !
该计算器支持完整的文件管理系统 !
- Create a file
创建
- Save
保存
- Open
打开
- Delete
删除
• Mathematical Functions:
数学函数
SIN(X) : sine of x
COS(X) : cosine of x
TAN(X) : tangent of x
COT(X) : cotangent of x
ASIN(X) : arcsine of x
ACOS(X) : arccosine of x
ATAN(X) : arctangent of x
SINH(X) : hyperbolic sine
COSH(X) : hyperbolic cosine
TANH(X) : hyperbolic tangent
ASINH(X) : inverse hyperbolic sine
ACOSH(X) : inverse hyperbolic cosine
ATANH(X) : inverse hyperbolic tangent
SQRT(X) : square root of x
ABS(X) : absolute value of x
FCT(X) : x factorial
LOG(X,Y) : logarithm of y to base x
LN(X) : natural logarithm of x
LOG(X) : base-10 logarithm of x
LOG10(X) : base-10 logarithm of x
LOG2(X) : base-2 logarithm of x
EXP(X) : base-e exponential of x
ERF(X) : the error function of x
ERFC(X) : the complementary error function of x
ROUND(X) : integral nearest to x
CEIL(X) : the smallest integral that is not less than x
FLOOR(X) : the largest integral that is not greater than x
TGAMMA(X) : the gamma function of x
LGAMMA(X) : the natural logarithm of the absolute value of the gamma function of x
X^Y : y-th power of x
• Statistical functions:
统计函数
SUM(a1,a2,a3,a4) : a1+a2+a3+a4
求和
AVERAGE(a1,a2,a3,a4) : (a1+a2+a3+a4)÷4
求平均数
VARIANCE(a1,a2,a3,a4) : variance
方差
SD(...) : standard deviation
标准差
SUMSQ(...) : sum of squares
平方和
AD(...) : absolute deviation
绝对方差
CV(...) : coefficient of variation
变异系数
SVARIANCE(...) : sample variance
样本方差
SSD(...) : sample standard deviation
样本标准差
SCV(...) : sample coefficient of variance
样本变异系数
• Help Manual:
帮助文档
“//” 指注释。被注释的语句不执行。
A=2
B=3
C=A+B
Click “Run”, the screen shows:
C=5
If the line C=A+B is annotated ,
A=2
B=3
//C=A+B
Click “Run”, the screen shows:
B=3
- Variable Naming Rules:
变量名命名规则:
Start with letters, and not involving keywords.
需字母开头。不得包含关键字。
A, A1, B25, HAT (对)
PRINT1, COS (错)
- The Usage of PRINT:
PRINT 关键字的使用方法:
A=10+5
B=10/5
PRITN A,B
Click “Run”, the screen shows:
A=15
B=2
Default variable name is RESULT , e.g.
如果数值没有被命名,则默认名为“ RESULT”
16+5*6
Click “Run”, the screen shows:
RESULT=46
- Combination & Arrangement:
排列组合
C(n,k) = n!/(k!(n-k)!)
排列
A(n,k) = n!/(n-k)!
组合
- Complex Number
复数
当屏幕中出现“i” 或 “∠”时,系统会自动进入复数计算模式。
e.g. X=3+4i or X=5∠53.1°
只有下面9个函数可用于复数计算
SIN(X), COS(X), TAN(X)
COT(X), SINH(X), COSH(X)
SQRT(X), ABS(X), CONJUGATE(X)
- Integral
积分
INTEGRAL X²,2,4
Default precision is 300 times of calculations. It can be more accurate, e.g. 500 times.
默认精度为300次。如果提高精度,可以修改。
INTEGRAL X²,2,4,500
- Graphics
函数作图
PLOT SIN(X)
PLOT X²
Default length = 10, width = 10. Specify the lenght = 20, width = 5. Then we have,
如果什么都不写,默认长度为10,宽度为10。可修改如下:
PLOT X²,20,5
Default dense is 150 points. It also can be customized, e.g. 200 points.
精度很可调整。
PLOT X²,20,5,200
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