×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# Curve fitting an elephant

## Curve fitting an elephant

### RE: Curve fitting an elephant

Hmm. I get the elephant part in my usual bumbling way, using MS-Excel...but he's rotated 90 degrees, which puts his eye in the wrong spot. It's probably because I'm in the upper left quadrant (NA) vs. Greg who's in the lower left (Oz). Also not following the wiggle parameter, so mine just stares at you fixedly, like that guy at the end of the bar near closing time.

### RE: Curve fitting an elephant

Animated GIF or get out

Both mine and Greg's ARE animated, given that they both contain the x(t) and Y(t) time based parameters. I.e., these are 4-dimensional depictions of the quantuum states of the elephant...to see them move requires that you imbibe at least 3 cans of Foster's Lager (in Greg's case) or the equivalent number of pints of Old Schoolhouse Ruud Awakening (for mine). And tomorrow they will be pink, and chase you around the toilet.

### RE: Curve fitting an elephant

(OP)
Only tourists drink Fosters.

I cheated, I actually plotted (y,-x). I'd point out that they haven't really used 4 variables, because you need 5 complex numbers it just so happens that the 4th is zero. That is, there is more information than just 4 complex numbers in the coding.

Here's a slightly better bit of trunk wiggling and the thinner lines show how the ellipses add up

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?

### RE: Curve fitting an elephant

He in OZ. True, it's in the other quadrant, but he's looking at the back of the screen too.

But it all works out: His AC current runs on a cosine curve, going backwards half the time.

### RE: Curve fitting an elephant

(OP)
I just realised these are Lissajous figures. So someone with a real oscilloscope and a talent for harmonic oscillator design could build a circuit that traces the elephant out. Now that is a science fair project!

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?

### RE: Curve fitting an elephant

How about a hippopotamus generated by a potentiometric X-Y plot?

### RE: Curve fitting an elephant

#### Quote (danw2)

Looks more like a rhinoceros to my untrained eye...

### RE: Curve fitting an elephant

I agree with cowski!

----------------------------------------

The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

### RE: Curve fitting an elephant

Very neat, Greg.
Now come up with a 4-bar linkage that will draw it!

STF

### RE: Curve fitting an elephant

Getting that imaginary link to fit properly is the real trick

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

### RE: Curve fitting an elephant

Here is my CNC programming project from college. I still have the punched tape!

--
JHG

### RE: Curve fitting an elephant

We scanned a cow with our LIDAR system back in the 90s for a college professor. Unfortunately I don't have an image to show.

Z

### RE: Curve fitting an elephant

Okay, reminds me of a joke.

A guy goes to the psychiatrist.
The psychiatrists shows him a card with a rectangle on it, and says, "What does this remind you of?"
The patient responds, "Sex!"
Next, the psychiatrist shows him a card with a circle on it and says "How about this one?"
The patient again responds, "Sex!"
Next, the psychiatrist shows him a card with a triangle on it and says, "And this one?"
The psychiatrist says, "I think I see your problem. You seem to be obsessed with sex."
"I'm obsessed with sex?", the patient says, "Look who's showing the dirty pictures!"

So let's just say that elephant could use a couple more constants to really look like an elephant instead of an amoeba.
The 4-bar linkage does sound like a worthy challenge, though.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!