How do I generate a graph by using 1000 sample points and certain frequency .?

Question

0.00/5 (No votes)

See more:

hi all,

i want to generate a sin wave as time on x-axis and amplitude on y- axis, i connected serial port RS-422 to my system ... can any one suggest me related article and some valuable ideas about generating the wave

thank you

What I have tried:

i generated a wave with out any values of amplitude and time but i want both of them as inputs
and vary the graph by changing the values

Posted 1-Feb-17 17:52pm

Member 12941572

Updated 1-Feb-17 21:19pm

DaveAuld

Add a Solution

Comments

Jochen Arndt 2-Feb-17 3:04am

This can't be answered without knowing the type / format of the input data.

If the input data are single sampling values (e.g. single bytes with values with values for 0 to 255), it is quite simple:
Use the received value as y position and increment the x position with each received value.
The time between receiving two values is called sample rate. When analysing periodic signals it can be used to calculate the frequency of the signal.

Pete O'Hanlon 2-Feb-17 3:14am

What type of application are you wanting to generate the sine wave as? WPF? Windows Forms?

Member 12941572 2-Feb-17 6:05am

windows form

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2017-02-01T21:19:00

As others noted, your request is a bit vague.
Anyway, you basically need to collect data coming from the serial port, perform some kind of normalization and the output them on the screen. You may perform this kind of operation 'on the fly' if you need to show a real time graph.
Use the SerialPort component to collect data (assuming you ahave a RS422 adapter, and whatever graphic framework/library you are using (you didn't specify it) to show it.