Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [graphing-functions]

Questions regarding the plotting or graphing of functions. Questions about graphs with vertices and edges should use the (graph-theory) tag instead.

0
votes
1answer
39 views

Use matplotlib to plot the functions $y = x^3 + 3x^2 - x + 0.3\ $ and $y = \sin x$

I'm new to Python coding and wondered if someone could give me the coding to plot these two graphs on the same program. This is what I have so far, exactly as typed on Python, however I know that ...
0
votes
1answer
29 views

Is this graph dense?

I am trying to find a function $[0,1]\to[0,1]$ whose graph is dense in $[0,1]\times[0,1]$ and came up with this: Let $f:[0,1]\longrightarrow\mathbb{R}$ be defined as follows: if $x$ is irrational ...
0
votes
1answer
27 views

How to find the domain of $(f^{-1} \circ f^{-1})(x)$, graph by hand, and evaluate using multiple functions

If $f(x)=e^x$, $g(x)=|x+2|$, and $h(x)=\frac{x-2}{x+1}$, what is the domain of $(f^{-1} \circ f^{-1})(x)$? I believe the answer to be $(-\infty,\infty)$ but I am not exactly sure of how to prove such ...
0
votes
0answers
12 views

Graph equation plotting where 2 moving objects with different speeds collide [on hold]

I am trying to find an equation that will plot the points at which 2 particles will meet given their speeds I have an image in my head of the line being an ellipse. Please see graph below for more ...
0
votes
1answer
18 views

How to create a 3D graph from two 2D graphs

I have an equation in the x-y plane, and another in the z-x plane. Is it at all possible to combine them into the x-y-z space? I realize that there might not be enough data to fill the gaps, but I ...
0
votes
1answer
20 views

How can we plot an equation in 3 variables on a 2D plane in context with functions of pair of Random Variables?

I came across the following question: The Question I tried solving it, the following is my attempt: $$ P[W\le w] = P[XY\le w] = P[Y\le w/X] $$ And then I simply double integrated keeping the ...
0
votes
0answers
35 views

Periodic or non periodic function potting

I am currently working on plotting a function and figuring out if its periodic or not. The function is as follows: $$x_n = \beta\cdot x_{n-1}+\alpha \gamma\cdot \mathrm{sgn}(x_{n-3})+\alpha(1-\gamma)\...
0
votes
0answers
16 views

Factorial function intersections

How would you find the intersection between a factorial function and exponential function? ie work out: $x! = 2^x$ Is it even possible ? As factorials only really work with integer values. When I ...
3
votes
2answers
53 views

What are the limitations of computer plotting?

The basic way of representing a function $f: \mathbb{R}\rightarrow \mathbb{R}$ with a computer, crudely put, is "connecting a number of dots". We can improve the quality of the representation by ...
0
votes
0answers
8 views

Insert new control points over an image

I'm trying to make an automatic non-rigid image registration using B-Splines as a deformation model, but I'm having some problems: Initially, I put a few control points (5x5), and after a long time, ...
0
votes
0answers
22 views

Find the function given its entire graph, complete domain, full codomain and exact parts of its graph as other functions

I need to find a continuous function with its domain in the closed continuous interval $ [0-\frac{\pi}{2}] $. Its complete range or codomain is within closed continuous interval $ [1-\sqrt2] $. I also ...
1
vote
2answers
31 views

How do I algebraically express transformations of a sigmoidal?

I am graphing a sigmoidal of the form $$ y=d+\frac{a}{1+e^{-(x-b)/c}} $$ I am investigating how the shape of the graph changes when each of the parameters a, b, c, and d are altered. I understand ...
1
vote
0answers
44 views

Beschreibung der Parabel [closed]

Find the graph of the parabola $y=x^2$ in the Interval $[ -1,1]$ , in Mathematiksprach.Wie verändert es sich? Dank für Ihre Hilfe.Ich bin Ausländer und lerne Mathematik und Deutsch gleichzeitig.
-3
votes
1answer
38 views

Name of $\log(-x)$ graph

I am currently writing an essay and am wondering if there/ what is the official name of the $\log(-x)$ graph. The searches that I have found seem to only give me that is inverse logarithmic, however, ...
-1
votes
1answer
32 views

How do you graph Sin of a double angle? [closed]

How does the double angle affect the sine graph, does it compress / stretch the graph, etc? eg. sin(2θ) = π/4
0
votes
2answers
37 views

Is $r^2-4r\cos(\theta)=14$ an equation of a circle or cylinder?

A question asks to identify the surface of the polar equation \begin{equation}\tag{1} r^2-4r\cos(\theta)=14. \end{equation} I converted $(1)$ into Cartesian coordinates: \begin{equation}\tag{2} (x-2)^...
-1
votes
2answers
32 views

sphere of radius 1 as parametric function

I know that the equation or a sphere of radius 1 in spherical coordinates is: $$\rho = 1$$ how to mathematically convert this above equation into one that looks like this: $$ f(\rho, \theta, \phi) =...
1
vote
1answer
40 views

Visual representation for a function $f:\left(\mathbb{C}^2\right)^2\to\left(\mathbb{C}^2\right)^2$

I am currently working with some matrix functions $\left(\mathbb{C}^2\right)^2\to\left(\mathbb{C}^2\right)^2$, and I would like to make some sort of graphic. I had an idea to split the output into ...
0
votes
0answers
18 views

How do you graph integer/fractional slopes?

I have entirely no idea on how to graph integer and fractional slopes which is, by the way, 8th grade math. It has to do with slope-integer form, which is finding the slope of a line in a graph except ...
-2
votes
2answers
31 views

Grade 12 Functions

I was hoping someone can explain to me step by step to get the answer for the following equation, I have no clue how to even begin solving the following questions. What is the period of this ...
0
votes
1answer
26 views

Equation for line parallel to z-axis and intersects x-axis at (x=k, y=0, z=0)

How would I pick $a,b,c$ to create a line that is parallel to $z$-axis and intersects $x$-axis at point $x=k, y=0, z=0$? $$ ax+by+cz=d $$
-1
votes
1answer
18 views

How to sketch $\rho = \sin \phi$ and $\rho = \cos \phi$ in spherical coordinates… [closed]

What's the technique to sketch: $$\rho = \sin \phi$$ and $$\rho = \cos \phi$$ in Spherical coordinates.
0
votes
1answer
16 views

Find sphere intersection point

I have a sphere which is originated at: $$ \begin{matrix} 0 & 0 & 0 \end{matrix} $$ Its radius r is 150. I have a line which goes from: $$ \begin{matrix} 0 & 0 & ...
0
votes
0answers
14 views

Algorithms to define “magnet” values to be used as y-grid ticks in stock market prices

I am writing a program which plots currency and stock market asset rates. For each plot, I will have a minimum and a maximum price for the covered period. Those minimum and maximum prices can be for ...
0
votes
0answers
16 views

How would I get the Heaviside function to be period in my solution?

so I am trying to solve an RC circuit problem that represents the square wave. Which I have already done on paper and now I am trying to plot it. So for this problem, we solved it using two methods, ...
0
votes
0answers
26 views

best way to plot the 3D shape made by many intersecting f(x,y,z) functions?

What's the best way to use a computer to plot the 3D shape made by many intersecting f(x,y,z) functions? I was trying to do something like the following, except I still have not idea what the shape ...
-1
votes
0answers
19 views

I want to get the domain and range of this relation

I've already drawn the graph and all. Got the yint and xint etc. but i want to understand how you can get the domain and range of the graph. The question is R = {(x, y) : y$\ge$-2x+3}
1
vote
4answers
45 views

How do I graph this?

I am just a high school student, so please excuse me if this question sound silly to you. How do I graph this : $\dfrac{9}{x} - \dfrac{4}{y} = 8$ I could do trial and error, but is there a more ...
3
votes
2answers
117 views

Solving $1^x+2^x+3^x=0$ equations…

Is it possible to solve for x this kind of equation? Since 1,2,3 are not multiples to each other I see a priori no possibility. $$1^x+2^x+3^x=0; x?$$ Computing this on Wolfram Alpha, for example, ...
0
votes
0answers
15 views

How to graph the derivative and second derivative to find if a function is speeding or slowing on an interval?

I am having issues graphing the first (Velocity) and second (Acceleration) derivatives of a function given to me in graph form. (Sorry for the poor graph drawing) I have a few questions: Is my ...
1
vote
1answer
28 views

Is it appropriate to consider a hole in the graph a zero?

Let there be a function $$f(x) = \frac{x^2}{e^x-1}$$ which has a hole at $x=0$. It also approaches $f(x) = 0$ at this point. Would it be appropriate to call this hole a "zero" or not?
0
votes
3answers
32 views

Rotate function, in respect to another function

I am working on a piece of code where I am translating some points along a function, for easing an animation. For example, I have a cubic easing function of ...
0
votes
3answers
30 views

How would I go about graphing $2x+3 > x^2 + y^2$? [closed]

How would I go about graphing this problem?
0
votes
1answer
36 views

Ellipse given by two variables in this form

I Have tried watching youtube videos and searching it but I havent found any in this form and I am struggling with math.Plus classes are not that great of a help so I decided to post here and see if ...
0
votes
2answers
30 views

Graphing A Piecewise Defined Function

A question asks to compute $$\int_{0}^{1} f(x) \; dx$$ given a piecewise defined function: $$\begin{equation} f(x)= \begin{cases} x, & \text{for}\;\ 0\leq x \leq c \\ c\dfrac{...
0
votes
0answers
35 views

How to sketch the following set $|z|=arg(z)$ [duplicate]

I want to sketch the following set: Set of all those complex numbers which satisfy the following equation $$|z|=arg(z)$$ Efforts: We are looking at those points in plane whose distance from origin ...
1
vote
0answers
12 views

Graph intersection of two 3d loci

I'm trying to graph a 1 dimensional object that curves in 3 dimensions. The only way I've ever been able to do this is with parametrics in Mac Grapher, or by graphing two 2 dimensional surfaces in 3 ...
0
votes
2answers
27 views

Graphing Relations on the Complex Plane

I am able to grasp most complex relations and their respective depiction on the complex plane however I am unable to get my head around relations such as these: $Arg(z + 1 + 2i) - Arg(z-1-3i) = \pi$ ...
1
vote
2answers
63 views

Is $ h(x)= \begin{cases} x[\frac{1}{x}] & \text{if } x \neq 0, \\ 1 & \text{if } x=0. \\ \end{cases} $ continuous?

Draw the graph and study the discontinuity points of the function $$ h(x)= \begin{cases} x[\frac{1}{x}] & \text{if } x \neq 0, \\ 1 & \text{if } x=0. \\ \end{cases} $$ Where $[\frac{...
0
votes
0answers
22 views

Plotting the sum of Heaviside functions in matlab

So I'm trying to plot a function in MatLab for different values of $k$. Given $u(t)$; $u(t)=1+2\sum^{\infty}_{n=1}(-1)^{n}H(t-n)$ I am trying to plot the function $y(t)$; $y(t)=\frac{1}{k^2}\Big{(...
0
votes
0answers
9 views

how to calculate growth rate from a semi-log plot?

In the following plot, if we model the population growth as a linear function of time, what would be a good estimate of the linear growth rate? I don't know if it's the slope of the line or where it ...
0
votes
1answer
10 views

How to turn multiple graph equations into a single equations?

Say I have this equation: $$x^2=y \quad y^3=x \quad x=y^{1/2}$$ and say I wanted to turn them into a single equation so they will be graphed from just one equation. I tried multiplying them and ...
1
vote
2answers
59 views

Graph Part of a line [closed]

The formula and graph below get close to what I want. This integral shows the AREA of 0.1 to 0.7 in this formula, but I only want the line SEGMENT from 0.1 to 0.7 How do I do that? Formula:$$ \int _{...
0
votes
2answers
46 views

Equation of parabola that passes through two points and vertex has coordinates ($x_v$, $0$)

I can't solve the last exercises in a worksheet of Pre-Calculus problems. It says: Quadratic function $f(x)=ax^2+bx+c$ determines a parabola that passes through points $(0, 2)$ and $(4, 2)$, and its ...
0
votes
0answers
18 views

Finding axes crossing and stationary points given an equation

Task - My goal is generate a set of graphs given different alpha numbers by showing variation how each increase in alpha numbers reflect on graphs. I will be able to generate this through python ...
0
votes
0answers
14 views

How can I draw the vector field lines that follows the direction of eigenvectors in Gnuplot?

I have 2 3-D eigenvectors and I would like to draw the vector field lines as converging to one eigenvector and starts diverging from the intercept with the other eigenvector. My eigenvectors look ...
-1
votes
1answer
11 views

help understanding how to graph a product function

to everyone. Please someone help me about graphs of product functions. How to start and how can I graph these type of functions? e.g. (e^x)sinx
0
votes
1answer
22 views

Is $\|\sin{x}\|$ a cycloid?

Forgive this seemingly basic question; I recently found out about cycloids and cannot find any answers on the web. My guess is that it’s not, due to some part of the definition of a cycloid, but I can’...
0
votes
2answers
35 views

Help identifying the function

I plotted some raw data and it looks like it's almost a perfect circle (the first half of it). From point H till point F we can see a nice circular curve. What's the relationship between H and F? In ...
0
votes
1answer
42 views

Smoothing of a step function using smoothstep. (Curve fitting)

I was trying to smoothen the step function (zero when $x$ is less than $2/3$ and equal to $1$ when $x$ is greater then $5/6$) as in the picture below. Trying to fit $f$ in between $2/3$ and $5/6$ ...