Mathcad

Hi, guys,As shown in the photo,What's the differences between i and 1i?Is it possible to use an operator or a function to find the magnitude (or angle) of a symbolic complex function? Hope you could help me.May the force be with you guys.Shawn

I am getting error after a solve block that reads "value must be scalar or matrix". Attached is my code below. Any help would be appreciated!

Hi, guys,for the vibration, how to represent U/U0 in terms of r, where r is equal to w/wn, and wn=(k/m)^1/2, as the natural frequency?Please see the attachment.Thank you in advance.May the force be with you!Shawn

Hi all,I have a macro that takes data from Excel and places the data into a MathCAD object within Excel. The MathCAD sheet then recalculates and spits out an answer back into Excel.Here is the problem: I can open Excel, push "Run", and the data gets spit out in about 20 seconds, but if I hit Run again (whether the data changes or not), the processing time increases to about 90 seconds. Obviously this is not preferred for a lot of data.I've tried to open & close the tab in a different workbook, but then my macro doesn't recognize the MathCAD object.Any ideas on how to cut down the runtime?

GuysThis should be pretty straight forward for someone who knows Mathcad prime3 - As I'm pretty useless at rearranging formula's can mathcad prime 3 do this for me?See attachedThanksI'm trying to make alpha the subject - I think I'm doing this right  but its coming up with solution not possible?  If I was to give the lambda1 etc figures would I get an answer?This is Prime 3.1.Those of us still in 3.0 would like to help, but . . .As Fred says, we would like to help, but those of us with Prime 3.0 can't read your Prime 3.1 file. If you post a pdf of your worksheet you might get more suggestions.I would do but it Looks like I can only upload a picture of 2mb?This document was generated from the following discussion: Re-arranging formula

My job requires a fair amount of frequency identification, so I've gotten reasonably acquainted with Fourier analysis.  Last week someone made the statement that a "Prony analysis" might be better to sort out two close frequencies (117 Hz and 120 Hz) in a five second record sampled at 2000 Hz. I started to formulate an example sheet for this analysis, using as an example a known signal.  When Prime 3.0 began to frustrate me (declaring both "Find" and "Minerr" as undefined variables after the solve block ha been happily computing for some time,) I switched to version 15 (old tried and true.)Now in addition to not being able to make sense of what Prony was doing I have two sets of answers for what is (as closely as I could mimic) the same set of math.Attached are two files; the Prime file lays out the Prony method as found in the literature.  The version 15 file is a quickly generated version of the Prime file, I've tried to keep the notation the same for ease of compariso

Hello,I need a little help in mathcad program to get the mean values of few columns(every third column) in a big m*n matrix. See  the attached image for description.I want to find the mean of highlighted columns, What I did now is I wrote a program to pull the highlighted columns into a new matrix and then I wrote an another program to find the mean of values in every row. I wonder if there is any way to find the mean of intermediate columns using one program without pulling these values into a new matrix and have an another program to find the mean for all the rows in that matrix. I could have attached my program file here but unfortunately I don’t have MathCAD in PC write now. Curious to get the answer by the time I go to my work tomorrow Thanks for your help!!Ashok

Hi there,For one of my engineering classes, we are designing a fluid distribution system and this involves the use of mathcad because of the process.We need iterative solutions to find our flow rates which in turn allows us to see our fluid velocities and pressure changes.Initially, we had our code working, but we're running into problems when making it short to print out for our final report.In our solve block, we are currently forced to use drawn out versions of our functions.We tried a couple different ways of shortening it.1)and are getting this error2)and get the same errorWhat I don't understand is why the solve block works when the long, drawn out version of the function is used, but doesn't when it is shortened.It should work. They are all equivalent.I am solving for Q (flow rates) only.I've attached the working version and the not working version of my sheet.Can anyone clue me in as to why I'm getting this error?

As an extension to Valery's Mathcad Prime Minister (Submatrix and Subvector), I'd like to propose the following extensions to Mathcad's subarray functions (unfortunately, I can't post worksheets to Valery's PM thread, otherwise I'd have posted this there).:The new submatrix function interprets negative indices as counting from the end of an array (ie, -1 == last row or column index).  The functions subvector (which has been in my library for a long time) is simply a specialized form of the new submatrix (a variant of which I've also used for a long time).  I've also included the functions firstrows, lastrows, firstcols, lastcols, rowends, colends and matends.   The first 4 are hopefully suggestively named.  The latter 3 are intended to provide a compact view of the first and last few elements of an array (I often find it convenient to look at the first and last values of an array calculation).Stuart

Dear All,   I would like your help to solve the display problem that i'm having with excel object embedded in mathcad. The display is moving when i click outside the excel object, and i can not look the view from excel in mathcad.   Thanks in advance,   Pedro       (view in My Videos)

Dear All,I'm having a problem with the excel object display in mathcad.As you can see in below video, I can not lock the excel view, when click outside the excel object.I would appreciate your help with this issue.Thanks in advance.

can somebody help me please in understanding  this error message " this variable is undefined" in attached file

Я студент, как мне получить лицензию для MathCad Prime 3.0?

HiI have been through many posts but i am not able to plot the attached expression. Can you please tell where i am doing mistake?I am expecting a periodic square waveform toggling between +/-24V with on and off period 5us.Here I used Ton,Toff as a cons; x as a variable and Vlp(x) as a function.<Unfortunately when instead of Variables I used to substitute assigned Numerical value it works>

Hello guys,This is my first post ever, and I need a response ASAP. I have been working on my Physical Chemistry Homework for 2 days now and while I was just about to finish, something odd happened. It told me the file was corrupt and shut down. I have attached the error message that appears. This is due tomorrow and I really need help!!! I have attached my file as well. Please help!!!!

Hello Everyone I have been through many post but i am not able to plot the attached expression. Can you please tell where i am doing mistake?I am expecting a periodic square waveform toggling between +/-24V with on and off  period 5us.Here I used Ton,Toff as a cons; x as a variable and Vlp(x) as a function

I am able to successfully import data via a text file (.txt) by using this READPRN command. However when the .txt file changes (i.e. data change), the import matrix in MathCAD is not automatically updated. I need to close the program down and re-open to have the updated numbers.The question here is, whether if there is a nicer way to do this? Another command maybe? I know I can always do right click “disable evaluation” and “enable evaluation”, but the problem is I open/use this Mathcad sheet through an easy batch code for an another program, so mouse commands are not an option for me.Thanks in advance!

Civie student here, got MathCad Express Prime 3.1 for several of my classes this semester that have labs and thus lab reports. Obviously one of the pros was that it could actually make graphs, compared to Excel which doesn't understand the x-axis. So I'm trying to graph data from a Geotechnical lab - grain size analysis - where the x-axis is diameter (mm) and the y-axis is percentage (unitless). I have three problems (possibly four):Unitless y-axisImporting data from a table (is that how it's done? I don't even know...I'm new to this...)Switching x-axis to the horizontal and y-axis to the vertical (they're currently the other way around)Defining x-axis values going backwards (smaller value towards the right)I say possibly four because reversing the direction of the x-axis scale isn't mandatory, it's just how we usually graph it.So...tips? Suggestions? Is what I'm trying to do impossible? Thanks in advance.

See please one simple optic problem and the symbolic solution:

Would someone be so kind to convert this file to pdf? Thanks in advance.

This study describes in detail the process of calculating energy characteristics of the gas turbine cycle (Brayton cycle) with modeling of the composition and thermophysical properties of air, natural gas and products of combustion along the flow in gas turbine.See Mathcad-sheets attach

Hi all,I am trying to solve a function symbolically.  However, I am having trouble with it, as shown below:As you can see, if I symbolically solve the function in the first line, directly, I get the desired result.  It shows the transposed function and then I evaluate to get the answer.In the second line, I try to assign the function to a function variable.In the third line, I try to call up the function to solve it explicitly, but it fails.  However, it still manages to find the solution, if I don't request 'explicit'.Is there any way to call up a function assigned to a variable and solve it explicitly?Any advice will be greatly appreciated.Cheers.

Hello Guys i have easy task to solved on paper even but can't find the proper code in Mathcad for it.The main task is really simple : A horizontal force of P = 100 N is just sufficient to hold the crate from sliding down the plany, and a horizontal force of P= 350N is required to just push the crate up the plane. Determine the coefficient of static friction between the plany and the crate, and find the mass of the crate.I don't want go deeper in technical aspect of this easy taks to calculate. The problem is in Matchad and my limited knowledge. How to set in equations with diffrent P value and find the solution in Mathcad?My work is seen below. But it's not going to work.The think is probably that i don't know how to use the result from two first equation and moved it to the next two to get the final result of it. Of course still don't know why for Mathcad the value of mi and m is as undefined...

See please http://twt.mpei.ac.ru/ochkov/Planets.pdfCan anybody help me with translation into English?