Mathcad

Hi folks, My problem is a simple one - calculate the vertical overburden stress in a soil mass.  The simplified equation is just [ unit weight of soil ] * [ depth ].  However, in a layered system with a different unit weight for each layer, the calculation is best formed as the sum of the vertical stress increments. To me that looks like a stepwise function constructed as a series of IF-ELSEIF-ELSE statements as shown in my example below.  It works but there is surely a more clever way. Lets say the bottom of layer 1 is z1 and the stress is p1, and the stress at some mid-depth in layer 2, say z2, is delta_p2, such that the stress at the point in question is p(z2) = p1 + delta_p2.  What is the most efficient way of structing that calculation as a function depth (z) so that it can be scaled to any number of layers.  My best idea so far is an "If" function to evaluate the stress at the bottom of each layer plus the portion of the n-th layer at the t

I have a matrix and would like to obtain the product of rowi+1/rowi How can I do it?

I was playing around with sorting and decided (yet again) that I was frustrated by some of the restrictions.  One thing led to another, and before I knew it, I was hip deep in ways to "improve" the lookup functions.    While contemplating Mathcad Zen Principles 3, 6, 7, 16, and 17, I wondered whether "unique" would be a worthwhile addition to the match/lookup modifiers.     Then my mind went blank when faced with how to handle NaNs.  In principle,  IEEE 754 NaNs are distinct.  And they would be if a standard Mathcad user had any way to distinguish between them, but they're harder to tell apart than Zathras and Zathras.  To the Mathcadder in the street, they might as well be indistinguishable, for all the good their distinctiveness does.   So, I've written two versions of unique to cater for both cases.   The question is which one would a user expect to be the default (and hence all lowercase) version?   I'v

I can't seem to create a scatter plot using a Chart Component.   Is there a way to do this?   

Is there a way to re-read Excel Data that has been imported into PTC Mathcad using READEXCEL? At the moment the only way I know how to re-read the Excel data is to delete the following and re-import:  

Hi there Why I'm having the wrong answer when calculating Re using (In) When Mathcad calculates it I get Re= 1.65 , however in my calculator I got Re=0.67 Thanks 

How is the person in this video creating a vector from the matrix?    What key sequence is used to achieve this?  https://youtu.be/Diq4hwvpPlw?si=SugsH3nFn_1xbJfR&t=34 

In Mathcad Prime how  do I specify that I want to establish a matrix that has 2 columns and 91 rows?

Readexcel not transferring correct values for scientific notation.  Below are example of change in the exponent from before to after;Before                                    After-4.30E-07-4,30E-05-4.26E-07-4.26E-05-4.13E-07-4.13E-05-3.92E-07-3.92E-05-3.62E-07-3.62E-05-3.23E-07-3.23E-05-2.77E-07-2.77E-05-2.22E-07-2.22E-05-1.58E-07-1.58E-05-8.67E-07-8.67E-04-6.96E-07-6.96E-058.08E-078.08E-04This results in a curve like this: I have found no way to correct the exponents on the two extreme points. The curve should be smooth. 

It says that I've reached the maximum number of license request available from my product type. Please help me

I am trying to use custom units in MCP v11. I have an included worksheet that includes a lot of domain-specific units and functions. This has been carried over from MCv15 and previous. I am now noticing that some of these definitions aren't working - I have distilled everything down to one simple example of success and failure, with no apparent reason why. See attached.I also tried to do my due diligence and see if anyone was reporting anything similar. Why there are lots of questions related to use of units, I didn't see a similar issue being reported.

MathCAD Experts,I'm trying to implement a model of a runaway reaction in MathCAD and I am stuck. I have tried everything including rewriting it several times to make sure that I don't have inconsistent units. I used the same variable definitions and then evaluated the derivative terms to make sure they were properly defined before defining them as functions. I thought I'd solved all my problems and now it's telling me that my initial conditions "aren't valid differential equations." Any advice would be most helpful.  I am using MathCAD 9.0.0Sincerely,Erik 

I need to write this equation this way > however the left part can't be written like ( 1/k)Thank you  

Hi there I tried to input the results from another mathcad file , but I guess I'm doing that wrong > in the following image I'm trying to import the results of ( R) What is the correct function to import the results from one mathcad file to another?When I searched in the community I found very old version which doesn't open in my laptop ThanksYusra 

Hello community, I have this problem:"How could I program it to sum 3 consecutive values in a vector (m), with the condition that the sum is performed only when there are exactly 3 consecutive values; otherwise, the result should be an empty string ('').""What I’m trying to do here is: in vector (a), if there is even one false, the result should be false; but if all values are true, the result should be true." 

Dear all, I have a problem with the step range. I want to prevent the value 0.50 from appearing in the first term of the function f(x1), according to the first method. I tried using the `last` function, but I can't get it to fit the vector x1.I have Mathcad version 11.Any suggestions?  

I have two problems defining the spectrum:1. Acceleration spectrum2. Displacement spectrumI tried to replicate it in Mathcad 11 without success. I followed an example created in Mathcad 13, which includes the Boolean function formulations, but the program detected errors because some variables are not defined, preventing me from graphing them.Please clarify what I'm doing wrong.  

Is there a function to convert from decimals to fractions?

Hello All,I’m not sure why the textbox result in P10 doesn’t have a red box around it, while the one in P11 does.In P10In P11Regards,Sam 

Hi there ,To be honest I don't even know I need to multiple selective values in a matrix with selective values in another matrix . I used ( submatrix function ) however it didn't work :where m is a row number Here I want mathcad to multiple the first three values from both d and z Can you help me doing this ? the sheet is attached Thanks Yusra  

Hello Community,  Please find the mathcad file in the attached it was developed in PTC91.In the following after the symbolic evaluation the units are not simplifying, for instance Ohms*Faradsshould be seconds, and Farad * Voltage should be Columbs, but 2.After Q2 as assigned as the result after the integration, when I try to call on Q2 it cannot be found, can someone please explain? Thanks 

I'm using WRITECSV to write the contents of a matrix to a .CSV file. The WRITECSV function writes the contents with full precision, giving me numbers with 18 decimal places. I want to round the elements to a few decimal places. I wrote a function to do this, but it feels kind of clunky. Is there a native way to accomplish what I'm trying to do? I'm using Prime 11. 

Hello!!i am kind of new to the program and I have researched but still can not find the answer. I tried to create a solve block where I can get the final reult of a variable H_2 but it does not work.I upload a PDF of the problem. I believe is not difficult but perhaps I am missing something

Why doesn’t Mathcad Prime 11.0.1 no longer accept ASCII code [13] for carriage return (new line)?It appears to work in version 10.0.1 but not in 11.0.1. Is this true for everyone else or just me?I have both versions on the same computer--is there something I am missing?   

Hi there,I am trying to fetch the required gross concrete cross sectional area of an RCC column using the SYMBOLIC Solver function as shown below. But I could not figure out what is causing this abnormal output. Could someone kindly clarify this issue? I would be much obliged.