Christopher2222

6 years, 283 days


These are answers submitted by Christopher2222

Case sensitive

April 10 2015 Christopher2222 3906

It is appearing that your use of Exceltools was the problem.  Use ExcelTools.

Another option is to use something like matrixplot with the option heights=histogram

currentdir()

March 25 2015 Christopher2222 3906

currentdir() will give you the path of your current worknig directory.

table

March 22 2015 Christopher2222 3906

Please reference this topic http://www.mapleprimes.com/questions/37691-How-Do-I-Change-The-Background-Colour

In a nutshell basically use windows desktop setup to alter the colors.  Failing wanting to do that you can change the font colors easily with Format->Styles or manage style sets and create your own.  As for the background (using the ref above) create a 1x1 table and change the colour in the cell. 

Speed performances for 2015 are much improved - link has been updated in initial post above - All three M algebra systems now have similar speed performances.

Maple 17 user manual and programming guide pdf's can be downloaded from here

http://maplesoft.com/products/maple/history/documentation.aspx

Under View select Show/Hide Contents... then uncheck box labelled Execution Group Boundaries

This problem could be applied to a similar issue in deciding which lengths to cut in set lengths of framing.

Home depot sells pine colonial casing in 7ft. lengths only.  I have 4 windows and one inside door (both sides) to frame.  The windows are 2 - 42x20 windows, 1-30x30 window and 1-16x20 window, the door is 72x32. 

What is the minimum number 7ft framing pieces I need to finish the job? and how do I cut the wood?

So I want to minimize my waste and hence minimize my spending.  

 

spaces

November 23 2014 Christopher2222 3906

It appears readdata stops reading when it gets to a comma.  Maple's readdata also regards spaces as a seperator.

readdata("d:/test.txt",string,5) will read in your data

invconv proc

November 23 2014 Christopher2222 3906

Another less desireable more complex/expensive way to convert the list back into the original number, is to create a procedure that manipulates the list created by convert using commands from the StringTools and ListTools packages. 

a:=convert(197,base,10)

                                    

invconv:=proc(a)
  uses StringTools:
  parse(DeleteSpace(Join(map(convert,ListTools:-Reverse(a),string))))
end proc:

invconv(a)

                197

 

 

collect

November 21 2014 Christopher2222 3906

collect seems to get rid of the negative sign and re-orient the values as well

 

ee := -ln(-a/(b-c));
ff := combine(ee, symbolic);
ln(collect(exp(ff), a));

                     

Expanding on Kitonums answer we could also create a procedure

deg2rad:=proc(d,m,s)
  local a: 
  a:=convert((d+1/60*m+1/60^2*s)*degrees,radians):
  print(a,evalf(a)):
end proc:

deg2rad(58,28,18)

                             

 

listplot

October 24 2014 Christopher2222 3906

Try listplot

with(plots):
listplot(DataTable3[..,1])  #plots the first column of your data

In the Maplesoft application center here http://maplesoft.com/applications/NewContent.aspx

Or at Mobius apps here http://mobius.maplesoft.com/maplenet/mobius/

Various other webpages also exist around the web.

. or *

June 09 2014 Christopher2222 3906

It is possible seeing that you have "******" in one of your answers that you are using "*" for matrix multiplication instead of "." 

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