Log Transformations with a TI-NSPIRE

[@TheRichzombie]

Honestly you have no idea how much you saved me and my friends academic career. We are both fortunate to have Ti-Nspires but unfortunately the entire school including teachers use different calculators. So let me say that before your videos we were struggling and now after we've seen your videos, out teacher is asking us what method are we using to get so good at math! So once again, I thank you on behalf of me and all the others who watch your videos and enjoy this subscription!!!!

[@profrobbob]

@puntermaster Thanks:) I am still learning this calculator as well and posting videos that are useful for the Stats class I am teaching. I learned about the past/copy command just before doing this vid. I am glad you found it helpful. There is a link to some instructional videos from the TI N-Spire homepage as well.

[@anzatzi]

Great video. You provide a an excellent example and manage to communicate alot about log graphs and using the nspire.

[@profrobbob]

That is a very good question! Go to Settings & Status then Document Settings and change the calculation mode to approximate:)

[@profrobbob]

I have gotten myself in trouble now...haha. I don't know what fourier series are..but I will look them up. Transforms??? Math with letters sounds like you would like to do things like enter an algebraic expressions and have the calculator factor it for you? If that basic example is what you mean, you need a CX CAS.

[@briancatch]

thanks for the reply, yeah sorry I didn't mention my model is CX CAS, I don't know how to use it very well though :), feel like I haven't pushed it to its limits so to speak! Yeah fourier transforms is something I'm still figuring out now, and using the calc would be a help. Looking forward to more videos

[@profrobbob]

Thank you. If you have any requests...please ask:) I am taking the next week off but after that...

[@profrobbob]

Thank you so much...and thank you for subscribing too! I hope you continue to find the help you need from my channel:)

[@profrobbob]

I don't do reciprocal transformations in my stats class. I am assuming you just mean y=1/x. Define a new column as 1/variable.

[@profrobbob]

Any pattern that is curved is not good if you are trying to fit a linear model to your data. It sounds to me like your data was perfectly linear and all your residuals are zero.? Some books will give you diagrams where the point form a horizontal linear band which is the same as your calculator auto zooming and giving you a random scattering of points in your residual plot.

[@mshetula830]

I love your Channel! When ever I talk about math, I always recommend your page. Thank you so much for this video-- you are one of the few that actually show how to use the InSpire CX and not features found on the CAS. All of the math professors at my college do not allow students to use CAS on test. Do you have any plans to make any video's that show how to use the CX for limit problems & if not, do you have any other video resources to recommend?

[@olimelonhead12]

For Residual plots, how do you know if the residuals are in a pattern or are random if they are lined up straight across the x axis?

[@briancatch]

finally good videos

[@briancatch]

Fourier transformations, are they doable on the CX ? A video would be great, both fourier series, and transforms would be cool, and I seem to have a problem making my CX do math with letters

[@jamieresasco]

How do you work out Reciprocal transformation on the calculator ?

[@profrobbob]

That's a great tip...thank you:)

[@profrobbob]

Not at this time. I will try to get one up in the next week.

[@Rufy248]

when you carry on logarithm in the spreadsheet, to you appear the result of the log, to me instead "log (3.6)". What should I do to bring up the value of the logarithm?

[@SuperDanny1016]

you don't have to press shift down before you paste the copied data... just select the first cell then paste

[@scarletmoon55]

Wow, thank you so much. but I have a question. U change only y to log y in logarithmic transformation , but why did U change both of x and y to log x and log y in power transformation?

[@marcopolo8036]

Goated

[@profrobbob]

BAM!!!

[@Dondon_s]

how do u get any location of intercept on a logarithmic regression function

[@rosewriter9554]

Wow, tou have literally saved my entire life. My class and teacher use a different calculator, and everytime a calculator is involoved i feel like im going to fail the chapter, in maths b and c! I cant thank u enough!

[@profrobbob]

+Rose Writer thanks for seeking outside help and choosing my channel to learn from. Please take the time to like, sub and share it with others...maybe even with your teacher so they can share it as an additional study reference with the rest of their students:D

[@LoveofGodIPC]

How would you square root all the x's can you tell me step by step

[@profrobbob]

Start watching at 4:22 only instead of selecting Log, just use the square root function instead. The math function will placed in the grey box, the top white box is for the name of a column.

[@D_Wylin]

How come my teacher uses Ln(y) and Ln(x) instead of log(x) and log(y) when finding log transformations?

[@profrobbob]

Personal preference. Just note Ln is log base e instead of log base 10. The numbers in the middle of your work will be different of course but the final models will fit the original data the same.