GUI for error calulations
Project description
"ErroRCalcS" is a GUItool to calculate uncertainties by using the uncertainties and the PyQt5 packages.
update 0.3.1
In version 0.3.1 there are some new features:
 you can chose now where to save the formula file via the 'save here'button
 you can open the file directly by clicking 'open'
 the Program checks the internetconnection in order to chose from where to open the usage.md
 completely new structure: some functions have been moved from GUI. py and calc. py to a new script (add. py) to make the program code easier to read.
Furthermore some bugs were fixed.
Usage / funktion
The aplication starts with a window with different input fields (see picture below):
 variable (name of variable, e.g. d)
 value (Value of variable e.g. 7.1)
 error (correspondending error on the variable, e.g. 0.8 or 0,8)
 formula (desired formula, using the variables and further values and arithmetic characters
By clicking on the 'addvariable' button, the entries are written to files in a folder named '.__log__'. By clicking on the 'calculation' button, the formula entry is also written to a file in the '.__log__' and 'calc.py' starts running, and writes the calculation and the result in files into the '.__log__'. Variables can be overwritten.
By selecting a format behind 'Safe used Formula for' the used formula for error propagation is written into a file named 'saved_formula.txt' in the current directory. By clicking the 'savehere'button you can chose, where to save the used formula. Clicking the 'open'button leads directly to the file where the formula was saved in.
If LaTex is selected, the formula is also written to the .txt file. You can copy this into a .tex document. If you import there the 'amsmath' module (\usepackage{amsmath}), you can use this formula without editing.
Input and Result Examples
General Inpus
variable  value  error  formula  result 

V, T, n  2, 283.5, 4.3  0, 0.5, 0.03  (n*8.314*T)/V  5067.591+/36.467 
x  4.3  1.1  sin(x)*3.5  3.2066+/1.5431 
y  3.254  0.032  log10(y)  0.5124175+/0,0042709 
x, y  4.3, 3.254  1.1, 0.032  log(x)**y  3.4156+/1.9497 
Arithmetic Characters
characters and operators  meaning  example 

+  plus  4+2=6 
  minus  42=2 
*  multiplication  4*2=8 
/  division  4/2=2 
**  exponent  4**2=16 
sqrt(x)  square root  sqrt(4)=2 
log(x)  natural logarithm  log(2.71828)=1 
logY(x)  logarithm with base Y  log10(2.71828)=0.4343 
sin(x)  sinus in radian  sin(1)=0.8415 
cos(x)  cosinus in radian  cos(1)=0.5403 
tan(x)  tangens in radian  tan(1)=1.5574 
asin(x)  arcsinus in radian  asin(1)=1.5707 
acos(x)  arccosinus in radian  acos(1)=0 
atan(x)  arctangens in radian  atan(1)=0.7854 
exp(x)  exponentialfunktion of e^(x)  exp(2)=7.3891 
Requirements
 Python >= 3.4
 uncertainties
 PyQt5
Installation
errorcalcs can be installed by pip3 install errorcalcs
(Linux) or simply pip install errorcalcs
(Windows). You can run the GUI with following code:
from errorcalcs.errorcalcs import run\_e\_c
run\_e\_c()
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