Mathcad

  To whom ever is interested in, here's Yet Another Bug in Mathcad's Symbolics

hello again! Can someone convert my XMCD files to prime 8, please. My Mathcad Prime 8 doesn't have the option to convert it even though I tried to reinstall it. 

HiI'm trying to analyse a beam under semi-ellipse load. In the analyses I try to form shear load, bending moment, slope and deflection functions with integrationof load function.If I use symbolic solution method the resulting functions become too complex.Could someone help me by making an example of determination of the shear load function?I hope that with one example, I would be able to solve the rest...Thanks in advance. 

Hello all, as a simple example I use a sinus function where I want to find the absolute minimum and absolute maximum. If the function will be more complicated then the local extrema are not interesting currently. I am looking for the absolute values. To be honest I don´t want to make a derivation d/dt and find the corresponding times via solve block. I would like to use some kind of integrated function. Unfortunately "max(vector)" and "min(vector)" does not work. My function f(txx) seems to be not an array ... Hm. Also I have found in the F1 help menu a function for local minima and local maxima. I understand that it compares the array elements but it also doesnt help. Can you help please? My sheet is attached. Also here the screenshot:  

I'm not really sure what is wrong with my document.   If I simply evaluate the function ZL() I get a vector output (or what I'd call a vector - matrix with one column).  When I take the same function and assign to a variable I get the error screen captured below.   Is there a way to explicitly define a variable to be a vector or matrix?   Or, is that not the problem?  I've attached the Mathcad Prime document.   EDIT:  Looks like the issue might be because I'm using a range variable (see link below).   So, how do I convert a range variable to a matrix/vector variable? https://support.ptc.com/help/mathcad/r8.0/en/index.html#page/PTC_Mathcad_Help/range_variables.html 

my ptc mathcad 8.0.0.0 student license just stopped out of nowheremy license is a student one and more than 30 days have passed, basic use, and today mathcad stopped working without any message and my studies are inside it. Can you help me understand what happened if it was a license problem or what can I do to solve it?

I want to get the input from excel do the calculation in Mathcad prime and return the output to same excel sheet is it possible. 

Hello everyone, Here I need a help in formula fitting. x=[0.2;0.3;0.4;0.5;0.6;0.7;0.8;0.9;1.0] y=[0.25;0.51;0.78;1.15;1.5;1.87;2.35;2.85;3.4] I want to fit formula y=A/x+B  , how can I calculate the paramaters of A and B using Mathcad. Thank you 

Is it possible to always get the results in desired unit style say I defined a variable with mm after evaluating it shifts to m but I want to keep it to mm by default I know I can modify the unit placeholder but wanted to know if there is any workaround for this 

Hi All, I'm working on a problem of dissipation of entrapped energy in a steam turbine, for which I would like to calculate the energy and display the result with units. However, when I try to include the units in the terms Mathcad finds some errors. As soon as I strip out the units, Mathcad finds a solution without trouble, please see my worksheet, attached. Any ideas what the trouble is and if there is a way to include units in the equations? Thanks!  

Hello to everybody. I am a user of MATHCAD Prime 8.0I defined a matrix as a result of computations performed in my code, where three columns have been filled with frequency (in Hz or sec-1), and the real and imaginary part of a wave-vector (k' and k'') and several lines (801).I was firstly surprised to see that if I define each column in a loop I receive back the notification that the variable has been "re-defined". The loop is below, with green-circled matrix element that receive this commentIn spite of this, the matrix is correctly filled, as I check by using  the statement "K=".On the other hand, when I try to save data in a file, I tried to use both "WRITETEXT" and "WRITEFILE", but the result is that the "K" matrix has no compatibility because of the units (see below) Now, the three columns have different physical dimensions, but they are correctly defined and I already used this statement in past releases (MATHCAD 15, before the PRIME) without any negative comment.Do you

Hello everyone, Here I need a little help in adding gride to the drawing in MathCAD prime . If anyone can help me out I will be really thankful. 

Both inputs are define and their values are shown below. Requesting a solution to this error.         

Dears, I´m using with great success the Coolprop wrapper, but one challenging task is to form the "mixture" string. Air for instance must be written as: "O2[0.21]&N2[0.79]" When working with complex mixtures, like up to 10 components, my idea was to use a table and extract a "concat" function from the table. All good doing it the hard way:(...)Problem: if I add or remove one of the 10 components from the table, maybe for a simpler composition, then the formula for "mixture" would fail. Solution: maybe write a program? But don´t even know how to start. Any help would be great. Best regards, Fred.   

I attached a simple example (clark transformation). Assume that I do not know the relationship between Uabc ,Ualpha and Ubeta. How can I derive the final transformation from the known equations? Thanks. The file was writen in Prime 8.

I am using a step function to define the first two values which are slightly different than the subsequent values and was able to do this in MathCAD v15, but I have just moved to Prime 8 and the function no longer works.  The except from MathCAD v15 is shown below.  How do I do the same sort of iterative function in Prime 8? 

Hi all,I am facing the following problem:I am defining a function with four variables, three of them jsut a number, and one is defined as a series or sequence. (sorry if incorrect)I would like to obtain the maximum of the resulting sequence after the function evaluates the variables, but it looks that this is not exactly a matrix, since the max function is not working correctly:thanks all! PD: I have seen some solutions but I am unable to open those files. @MarkArmstrong https://community.ptc.com/t5/Mathcad/Create-a-vector-from-the-result-of-a-function/m-p/191688/highlight/true#M75105      

It is necessary to express the power of the power plant in decibels.I go online and find out that bel is the decimal logarithm of the ratio of two physical quantities, the second of which (the denominator of the fraction) is called a certain base. In the same place on the Internet you can find the corresponding formula for the calculation.Here's how such a calculation might look like in Mathcad 15 with the help of tools for separating variable and function names into styles using different font colors (black, green, blue and white - invisible).If one watt is taken as the base, then the power of the largest Russian thermal power plant, Surgutskaya GRES-2, will be 96.812 decibels (see please the picture and the attach). We solve the inverse problem: given the power in decibels, it is necessary to calculate the power in the usual watts. Question. Why are decibels called decibels and not decabels? After all, if we multiply the logarithm by ten, and not by one tenth.   See please als

Hi I'm trying to solve an issue where I want the if function to work, when one of the variables in some cases could be undefined. Is this possible, or have some work around? I'm using Prime 9.  

I m trying to calculate the reaction influence line for a simple indeterminate beam problem.I built up functions for fixed end moment and slope deflection equations. Now I m trying to calculate rotations at the end supports of the beam, I m getting error because the slope deflections equations are conditional expressions. I m expecting set of end moments when the load is placed on the particular element. How can I achieve this ?    

I want to have the plot values on scale directly and not modify the scale within plot is it possible in 15?

My 3D plots have started appearing like this:When I drag the plot area, the problem disappears:But as soon as I let it go, the weird pattern reappears. I thought it might be a problem with the mesh frequency pairing with the pixel spacing on my display, but resizing does nothing, and, in fact, the problem appears as soon as I open a new 3D plot area.  Anyone encountered this?  More pertinent question: does anyone have a solution?Working in Prime 8.0.0.0 Thanks for any hints.Richard   

Hi I want to extract a given value from a table based upon two variables. For exampel, by selecting the variables "A" and "b" I want the extracted value (output) to be "5". Is this possible to do? Thanks in advance.   

Has anyone figured out the format to use the TAG tool when doing an internal link. The instructions seem to say the TAG is #xxx. But when I link to it a text box I don't get it to transfer to the TAG. Yes i am using [ctrl-click] .In Mathcad 15 it was a useful tool to move around a multi-page worksheet.