Mathcad

Dear all,   I need to solve a system of non linear equation. I have a problem with mu(theta) function: if I use this function in given-find system, mathcad not find solution, but if I set a constant value the system is solved.    How can I set the mu function, into the given-find solution to obtain the correct solution?   Best regards Stefano

Hi All,   In the attached (MCP3) I am trying to define a matrix based on an existing one.    I have a series of matrixes with different index values. When I split each column to a single matrix this works but when I try to do the same for an element of a wider matrix it seems to not work. Is there a way of doing this with a snazzy programme or similar?   Andy

Hello, What is the best way to handle units in a curve fitting equation situation. On line 4 if I leave the ksi in then line 6 does not work, I had to create a unitless line 5 to get line 6 to work. Also I had to text in the word "cycles"  because MC does not take cycles unit in lines 6 & 8.   

I have a worksheet in which I am using the excel component to build an output table.  It appears that there is a limit to how much you can put into an excel component, because, when I reach a point in building the table, when I add one more element I get the error message "this expression is too large to be calculated".  The error occurs even on expressions that are constants.  In a couple of cases, the files have somehow become corrupted and crash within second of opening them. Does anyone have any insights? Thanks, John W

Hi all, I have several column vectors that I need them to be merged into a one big column vector. The problem is that as they have several dimensions, Mathcad add zeros to match their dimension before merging them. The zeros make errors in calculations. I wonder how I can avoid these zeros? Many thanks.

I am having an issue with finding the max value of positive and negative values.  I want it to always pick the highest integer but to have it's sign remain the same.     For instance, x=10, y=15, z=-20 are my numbers calculated that    t:=550*[max(x,y,z)] -p is depended on.    if I do r:= max(x,y,z) it will state that r=15 when I need it to pick the worse case for an equation it will be integrated in later on.    if I do r:= max(IxI,IyI,IzI) it will state r=20 but not -20 cause of the absolute value.   Is there a different approach I can do where I wouldn't have to use solve for t for each single case and pick the max absolute value of all three?

Hello To All,   A few of you were really helpful in pinning down my indexing problem. In the attached is part of what I have been working on in the background. Please do not get too hung up on what the overall picture is or anything until the end of the sheet, you will see that I have created a couple of tables toward the end of values and have integrated between two sets of values (column 1 of each table with matrix Z(I) to get some areas and then have integrated these areas to get a volume. I now want to do this in terms of j I.e. get 5 volumes to account for each column of the tables. Any ideas where I am going wrong?   Thanks,   Andy.

Is anyone able to give an idea to the second part of my question I am looking at?   https://community.ptc.com/t5/PTC-Mathcad-Questions/Indexing-again/m-p/499486#M178274  

It’s been a while since anyone has asked, and the answers were a bit generic. In principle, yes it shouldn’t be limited by 32-bit, or perhaps limited to memory heap...However, I have found a much smaller limit. I read in scope data, 20,000 points of 8-bit data, padded to 64-bits most likely, so is at most 160 kB. Doesn’t sound too daunting. In fact I can read it in, several columns in fact, manipulate it, plot it all, no problem.However I cannot evaluate it as an array. Wasn’t really trying. But kept getting errors when I tried including this worksheet into a report style of worksheet... 20,000 points barfs on the include. Then I notice that I can’t even display the array as a table. Really? I have to find a file transfer workaround? It’s a lot of data files... or try to embed EVERYTHING within the report??

Hello everyone,   Lets say I have: x=2 and y=5   I want to create a new variable that is going to be equal to the variable with the highest value, per say...   z=max(x,y)   and in return get 'y' not 5 but if I change the 'x' and 'y' values I want it to return whichever variable has the highest value.   PS Im new at this, maybe I am missing a simple rule of programming, not sure... 

Can someone help me with this program. I am not able to execute the while statement.   Thanks

It is the site of the article V. Ochkov, F. Kolhepp ART, PHYSICS AND INFORMATICS: CENTER GRAVITY OF THE BLACK BOX Annotation The article proposes a laboratory work at the intersection of physics and computer science: the definition of the center of gravity of a plane arbitrary figure, as well as a physical body of an arbitrary shape. Keywords: flat homogeneous figure, a homogeneous body, the center of gravity, center of mass, the scan pattern, random number generation, matrix, Mathcad.   Mathcad 15 sheets of the article in attach. Pictures: Fig.1. Definition of the center of gravity of a flat figure Fig. 2. Determination of the center of gravity of a flat uniform black and white figure Fig. 3. The center of gravity of the triangle        Fig. 4. Determination of the center of gravity of the semiring and the ring sector   Fig. 5. Determination of the center of gravity of a flat figure with holes   Fig. 6. Determination of the center of gravity o

I have two questions to one Chebyshev (Tchebyshev - Чебышёв) linkage (see more https://en.wikipedia.org/wiki/Chebyshev_linkage) 1. Do you know how to change lengths of links in to get one (strictly) straight line of motion for point 4 or other curve? See please first animation and files in attach - Mathcad 15. I have a plan use the MinErr function but not too simple! 2. Why I have an error by changing L14? See the animation two. When I use not the solve operator but the Find (numeric) function - no problem (see the animation 3)

to all,   I am trying to set up the standard convulsion /Duhamel integral for a damped SDOF subject to an arbitrary input p(t) but can’t figure out the syntax required in MathCAD to make it work. Could someone help me on this one? (see attached mcad file)   Thanks Regards

I'm having trouble entering the subscript "n-1" after "prev"  The - 1 doesn't stay with n as part of subscript. Any suggestions?  I'm using PTC Mathcad Prime 3.1

Hello, When I box select a bunch of equations, and I put the mouse in the grey area at the bottom, it just zips to the end of the file. After a few choice cusses, I put the mouse on the grey area on the top, and the darn thing zips to the top of the file. Is there any way to slow down the scroll? I tried putting the mouse very close to the grey zone boundaries, but that does not help.

Hi everybody, my question is very simple but, as the same time, a bit complicate. I would like running a Mathcad sheet over different input values. At the beginning, I solve the problem with equations in vector modus, but I need increase the calculus with several conditionals and complicate equations. Vector modus gives me a lot of problems and the number of table rows will change. I thought, maybe it will be possible runs equations on each table rows (from 1 to N) and export results to an Excel files. Is it possible? Another idea was running Mathcad sheet over different input excel files. Output results would be exported and stored to each excel file. ¿?   Thanks in advance. You are great 

I am working with another engineer.  When I open his sheets there are problems with text overlapping one another. If it were screen size I would think that it would still print out ok, but it does not. It prints the sheets with the overlapping print.   Is there a way to fix this. 

Hi, I am trying to convert an MTF of an optical system by taking the magnitude of the fourier transform. I have attempted this but the result doesn't look like it should.   I cannot see any obvious mistake.   I appreciate any help, thanks Jason

Hi all, I am looking to program a script (presumably VB) that can help automate the assessment of structural members. We have numerous structural members (with various material and geometric input properties), which are subject to varying applied input loading.    I'm looking to create a script that can read the input variables (geometry, loads, properties...) from Excel into a pre-existing MathCAD calculation. The MathCAD calculation uses the input variables to calculate structural member utilisations.   I would then like to export the MathCAD calculated utilisations to record them in Excel against the relevant member.    Many thanks in advance - Iain    

Hello, Am trying to get a simple plot of cosh(1/x) working.  It will graph the negative region (x<0) but not the positive.  How do I fix that?   Regards Jack

Hello all,   I'm having issues installing Mathcad Prime 4.0 Express on a computer here. Whenever attempted, it returns with this error:   Could not access network location [MSIINSTALLPATH]. Could not access network location [MSIINSTALLPATH]. Unsuccessful PTC Mathcad 15 M045 or later is required to convert older Mathcad documents to PTC Mathcad Prime 4.0. To enable conversion functionality, you can download and install PTC Mathcad 15 M045 or later by visiting <http://www.ptc.com/engineering-math-software/mathcad/free-trial|http://www.ptc.com/engineering-math-software/mathcad/free-trial> Whenever you try installing Mathcad Prime 4 Express, it shows up on the screen that the program will try to update from Mathcad 15 M010 despite it not being installed before.

Now we have a lot snow in Moscow. I am going to ski tomorrow! One my old Mathcad New Year Card:

I would like to read values from an Excel spreadsheet in Prime, the same way I did in Mathcad 15.  PTC support set up a Mathcad file using the READEXCEL command.  The associated Excel file needs to be in the same folder as the Mathcad file for the data to be read.  Is there away I can bind or embed the Excel file to the Mathcad file, so I don't need a copy of the Excel file I am working with in every folder?   I have tried to insert an Excel component.  Due to the size of the spreadsheet, converting it to a matrix in Mathcad Prime, and reading the values is extremely cumbersome and related to how much of the table is visible.     Thank you!

Hello, I am solving an optimization problem with the resolution block, in the solver part I got an error because the number of arguments is greater than 16. How can I correct it.   I read that to reduce the number of arguments I have to create a vector of arguments, is that so? How can I do it?