Recent content by Martyn Arthur

Great thanks; I ave worked out the workbook installation; and I guess when I an up and running writing the code will be a process to learn. I am stuck wit the 'simple' basics of understanding the system; textbooks seem lean on this; any suggestions please? Thanks Martyn

TL;DR Summary: Asking are you able to assist with problems relating to SQL coding and preparation Hi; I am looking to move into the fireld of Pyton and SQL working towards maybe employmnet in those fields (do people age 75n get jobs :-)) Anyway it looks daunting with ancillairy references to...

I understand now; thanks for your time and help Martyn

Thanks for the responses, points noted, missing bracket follows at the end af the statement. I am working on the basis of the procedure I have been given attached.

Hi I am not looking for the calculation to be done; thats my job. I can't figure out the format of the multiplication. Is it ((sinpsii)(xzi)+(cospsij))(xzi)+((sinpsii)yj+(cospsij))yj +((sinpsii)(x+y)k+(cospsij))(x+y)k then requiring simplification? Thanks Martyn

This is all really helpful; thanks Martyn

Thanks;; its an astrophysics course; we aren't expected to learn Python or being taught it. We are just given the Python notebooks to use to plot the data from, on this occasion star clusters which is what has happened, its worked and we have the plot. Below is a plot of the same cluster Its x...

TL;DR Summary: How to understand the code determining the plot Hi; this is the code I have been given for a H-R diagram of M35; I understand the inversion concept.. The plot is below. I am trying to understand the code that creates its position and size and how to alter it to a more...

Thank you; I need to go away and think about it. Martyn

So naming the 2 solutions x we have +x and -x?

I understand the basic maths but I am getting varying answers as to whether these are real distinct roots or not. Could you please explain the mechanism for deciding this. Thanks in anticipation.

"A linear expression is that the variable occurs as with exponent of 1. " This makes it perfectly clear; thank you. Martyn

Thanks but the explanation is a little more advanced for me. My text book (Open University MST 124 Book C) discusses integration by substitution for the first example; but then goes on specifically to explain how to integrate linear functions in respect of the second function? I seek to be able...

I failed to mark my just sent post to receive email alerts for replies; could this be rectified please? Thanks Martyn

I understand linear expressions map straight lines. How can I identify which expressions are linear; is x/(1-x^3) isn't linear but 1/(1-x^3) is linear? Thanks Martyn