## Creating a graphing calculator in python

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Write for DigitalOcean You get paid, we donate to tech non-profits. DigitalOcean Meetups Find and meet other developers in your city. Become an author. The Python programming language is a great tool to use when working with numbers and evaluating mathematical expressions. This quality can be utilized to make useful programs. This tutorial presents a learning exercise to help you make a simple command-line calculator program in Python 3.

For this tutorial, you should have Python 3 installed on your local computer and have a programming environment set up on the machine.

If you need to either install Python or set up the environment, you can do so by following the appropriate guide for your operating system. Calculators work best when a human provides equations for the computer to solve. Inside of the parentheses of the input function we can pass a string to prompt the user. After writing our two lines, we should save the program before we run it. We can call this program calculator. You should be able to type into the terminal window in response to each prompt. Depending on our needs of the calculator, we may want to convert the string that comes in from the input function to either an integer or a float. So far, we have set up two variables to store user input in the form of integer data types.

You can also experiment with converting the input to floats. We want the user to receive confirmation about the numbers they are entering and the operator that is being used alongside the produced result. At this point, you can add the rest of the operators to the program with the same format we have used for addition:. If we run the program at this point, the program will execute all of the operations above.

However, we want to limit the program to only perform one operation at a time. With our calculator. We could choose whatever symbols we want, though, like 1 for additionor b for subtraction. Because we are asking users for input, we want to use the input function. Because of how we have structured our program, the if statement will be where the addition is performed, there will be 3 else-if or elif statements for each of the other operators, and the else statement will be put in place to handle an error if the person did not input an operator symbol.

To walk through this program, first it prompts the user to put in an operation symbol. Next, the program asks for 2 numbers, and the user inputs 58 and At this point, the program shows the equation performed and the product. You may want to consider other possible options for handling various situations. In this block of code, we want to give the user the choice as to whether they want to calculate again or not.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. When I test values with y-intercepts, they go throgh the origin, which means it's not working. I'm trying to get the y-intercept working.

### Plotly Python Open Source Graphing Library

I see two issues: 1 you seem to be doing things in the wrong order; 2 you incorrectly assume that if y is f x then f -x is -y which isn't true:.

Learn more. How do I make a linear graphing calculator in Python with turtle graphics? Ask Question. Asked 1 year, 1 month ago. Active 1 year, 1 month ago. Viewed times. Why doesn't this code work when I try to graph? The y-intercept doesn't seem to work. Nicholas Chan Nicholas Chan 1. Xion, turtle doesn't require a cal to Turtle as the default turtle can be used if only one turtle is needed. This is the functional interface to turtle as opposed to the object-oriented one.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I created a graphing calculator that works for most functions. It takes a user string infix expression and converts it to postfix for easier calculations.

I then loop through and pass in x values into the postfix expression to get a Y value for graphing using pygame. The first problem I ran into was when taking calculations of impossible things. If something like this would happen I would output None and that pixel wouldn't be added to the list of points to be graphed.

If you would like to only see my most current code and method, jump down to where it says "current". My first method was after I acquired all my pixel values, I would paint them using the pygame aalines function. This worked, except it wouldn't work when there were missing points in between actual points because it would just draw the line across the points.

My next Idea was to split the line into two lines every time a None was printed back. My next method was to convert the each pixel x value into the corresponding x point value in the window for example, 0,0 on the graphing window actually would be pixelon a x program window. I would then calculate every y value with the x values I just created. My most current method is supposed to be a advanced working version of method 2. Its kind of hard to explain. Basically I would take the x value in between each column on the display window.

For every pixel I would do this just to the left and just to the right of it. I would then plug those two values into the expression to get two Y values. I would then loop through each y value on that column and check if the current value is in between both of the Y values calculated earlier.

This fixed the problem in method 2 of having the pixels not connected into a continuous line. I am stuck and can't think of a solution. The only way I can think of fixing this is by using a whole bunch of x values. But this way seems really inefficient. Also I am trying to make my program as resizable and customizable as possible so everything must be variably driven and I am not sure what type of calculations are needed to find out how many x values are needed to be used depending on the program window size and the graph's window size.

I'm not sure if I am on the right track or if there is a completely different method of doing this, but I want to create my graphing calculator to able to graph any function just like my actual graphing calculator.

I just tried using as many x values as there are pixels x display window calculatesy values.Graphing calculators with Natural Textbook Display, spreadsheet and Python, ideal for mathematics learning. So you can spend less time teaching how to use graphing calculatorsand more time teaching mathematics. Solve the Polynomial equation. Use the G-Solve feature to easily solve problems involving intersections, roots, and integration.

Graphing calculators have a variety of functions covering from primary to higher education. Students can cultivate mathematical thinking through Graph functions operated by themselves. Students find answers in different ways. For example, students can use either Graph, Equation, or Matrix function to solve the simultaneous equations below. Solve the simultaneous equations.

The fxGIII comes built-in with Python, a programming language used in the development of Internet search engines, social media sites, robots, etc. Python is attracting attention in the field of education as a learning tool that cultivates algorithmic thinking and has been adopted for use in textbooks. Python mode supports a version of MicroPython Version 1.

Please note that MicroPython is different from the Python that runs on a computer. Data-logger can be used with graphing calculators and is effective for both mathematics education and science and technology education. This mode allows you to quickly prepare your calculator for exams. This mode restricts access to memory, programs, functions and applications, so that these features would not be available during exams.

Interactive format. G-Solve feature. Icon menu. Function keys. Example Solve the Polynomial equation. Icon display. Input coefficient. See more. Inequality Graph. Polar coordinate graph. Learn mathematics more deeply using Explore feature Students find answers in different ways. Example Solve the simultaneous equations. Using Graph Icon display. Input Equations. Draw Graphs.In this tutorial, I am sharing code to create a simple basic calculator to add, subtract, divide and multiply two numbers.

In an earlier article, I have shared a Python complete basic tutorial for beginner. That article is featured with the simple command line code by which you can add, subtract, divide and multiply two numbers using commands. The intention of the tutorial is not only to make the Calculator but also to understand the how GUI objects are created in Python. You can copy-paste and use it.

Follow this article step by step, you can write your own code. Trust me you will learn something amazing. QtGui package. It provides inbuilt functionality to create GUI objects like text area, button, labels…. QtGui package installed on your system, you can download and install with this simple command.

All the GUI objects will be configured inside the init function.

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It is the first function to be called. For example, if the user clicks on the multiplication button, it calls multiplication function. It reads the value from two text fields and performs the multiplication operation. The value in input text field is in the text format and you need to convert it into an integer before performing arithmetic operations. Write a dedicated function for each of the arithmetic operation. These functions return the output to the caller.

If you take the other programming languages, it is not so much easy to create GUI, but the Python does it with ease. Now here it is you are looking for…. Now, this is all for you. Get your hands dirty with code and show your skill. Sir your tutorial is very explicit.

## Plotly Python Open Source Graphing Library 3D Charts

Personally, I have not tried using any tool for GUI. It is an Open source GitHub project. You can try. Looks like you have installed PyQt5. The code in this tutorial is based on PyQt4. Either you can try installing PyQt4 or find suitable matching functions in PyQt5.

I think you are using a Windows operating system. Looks like python3. Check if it is there. If it is there and you are using virtual environment, copy python3. Save my name, email, and website in this browser for the next time I comment. What do you want to Learn Today? Code Python. Aniruddha Chaudhari.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up.

Also, a case-insensitive match would be much better. For that, you might want to check method lower or how to use regular expressions in Python. Judging from your use of printyou're aiming at Python 3. If this is the case, then - unlike in Python 2 - you don't need. However, even in that case, converting only one of these two variables to float is enough.

## Python | Simple GUI calculator using Tkinter

Like most all? This might help you significantly, but be careful to not pass on just any potentially junky user's input. Why don't you first input x and yand then do if-elif block for the actual computation, or, at least, make a function to input x and y and return them functions in Python can return multiple values? You have functions for simple expressions which are called only once multiplication, subtraction, etcwhich seem completely unnecessary, but you don't make one for 12 lines of code which are invoked 4 times in your code.

Regarding your naming of functions, function names should be lowercase, with words separated by underscores as necessary to improve readabilityi. I like how you put dividemultiplyadd and subtract each into their own function, but it would be even better if the function returned the result instead of printing it. That way, you can do something else with the result instead of printing it if you want to, and still use the same function.

One thing that bothers me is that you have the same 12 lines of code 4 times. You should reuse the same lines as much as possible, so that if you want to change something, you only have to change it in one place.

This code should appear only once:. But that piece of code above still repeats twice what is essentially the same thing. We should also do something about that.

I would use a function I'd put the function next to the other functions at the top.

How to Build Scientific Calculator Using Python class object with math module

I would change that by making the content of operation lowercase as soon as possible:. Now you don't need to care about case anymore. Note that this isn't exactly the same, though: it will also allow input such as MULtiplY. I think operations is a better name than thelist. And we can change our two checks for each operation to:. This post is already quite long, but one more thing: you should change your code to use 4 spaces per indent. This is because tabs can be displayed in different ways, for example, they break the indentation on here stackexchange if you're not careful. Most editors have a setting so that when you hit the tab key, 4 spaces appear. To change the code you've already written, use the editor's replace option to replace each tab character with 4 spaces.

A key concept for consolidating all that functionality is to define a BinaryOperation class. Then, instead of writing out the instructions explicitly, let the data drive the logic. That function can then be assigned and passed around, just like any other value in Python. For example, instead of saying. In Python, lambda s are limited to just one expression, to prevent programmers from trying to squeeze too much complex code inside. But that's just perfect for our simple calculator.

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We pass the lambda as a parameter to the BinaryOperation constructor, where it gets stored as the BinaryOperation object's op variable.To make simple calculator in python to perform basic mathematical operations such as add, subtract, multiply, and divide two numbers entered by the user. To make calculator in python, first provide 5 options to the user, the fifth option for exit. Here are some sample runs of the above python program to illustrates how to make a simple calculator.

This is the initial output giving users, some number of choices 5 choices to choose any one from all these 5 choices. Now let's first try for the addition task by choosing or typing 1 as input and then enter any two number say 1 and 2 and then press enter key to check it out:.

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Now let's re-run the calculator program to this time check it out for subtraction of two numbers say 2 and 1 as shown in the following sample run:. Again re-run the same program, and this time, provide 4 as input to check for division task and supply two numbers, that is first number as 20 and second numbers as 3 then press enter key as shown here in the below sample run:.

Tools Calculator. Python Program to Make Calculator. Make Calculator in Python To make simple calculator in python to perform basic mathematical operations such as add, subtract, multiply, and divide two numbers entered by the user. Addition" ; print "2. Subtraction" ; print "3. Multiplication" ; print "4.