## How to plot the matrix?...

Asked by:

Good day to all, i want to plot the matrix but here is a problem...

with(plots);
with(LinearAlgebra);

x(t) := `<|>`(`<,>`(.9582+1.9874*t-2.059*t^2+2.6184*t^3-3.7508*t^4, 1.11935+1.4898*t-.6319*t^2+1.037*t^3-1.4695*t^4))

matrixplot(x(t), t = 0 .. 4)

Error, (in plots/matrixplot) cannot convert first argument to a floating-point matrix

please help me...... how to solve this?

## Unterminated loop when using operator assignment...

Asked by:
```tot := 1:
for z in 1, x, y, q^2, 3 do
tot += z;
end do:
tot;
```

When I run the code above, Maple gives me "Error, unterminated loop".

However, if I change the code to

```tot := 1;
for z in 1, x, y, q^2, 3 do
tot := tot + z;
end do:
tot;```

Maple computes the result correctly.

I don't see how the loop is unterminated. Am I not allowed to use operator assignments in loops?

## Mapel Learn "Steps" button question - No Integrati...

Asked by:

I have been using Maple Calculator on my phone and found that the "Steps" to solutions option was useful, particularly for integration. However, I spend more time on my computer than phone and thought that Maple Learn would be even better. When I tried the free version of Maple Learn the "Steps" button never appeared. I thought this might be because it is only available with a subscription, so I have subscribed for one month to evaluate. However, after doing that the "Steps" button still did not appear. After a bit of digging, I found the Steps documentation and found you must open specific documents from the Maple Gallery for different problems to get the Steps button which seems a bit odd when the Maple Calculator does this automatically. Worse still there does not seem to be an option for integration!

Although I can see a lot of benefits with Maple Learn this seems to be a backward step (pardon the pun). Also, even though I have subscribed to Maple Learn, I still do not appear to have Premium on my phone in the same account. Again, a little disappointing.

Have I misunderstood something or is this the way it is?

Will

## How to import data with headers...

Asked by:

As a newbie I am still trying to learn Maple. I was wondering whether it is possible to import this txt file 2011068_2_ex.txt which contains results of different measurements separated by a header. I would like to import the data for each measurement without the header and to extract some data from the header. Is this possible in Maple and what should be the best method for doing so? What I would like to obtain at the end is Extracted_from_the_header.txt and raw data for the 4 measurements.

Thank you in advance for all help.

## How do you get a polynomial that satisfies this co...

Asked by:

If I want to get an irreducible polynomial with root sqrt(5) and minimum degree, I can use:

```with(PolynomialTools):
MinimalPolynomial(sqrt(5), x)```

But what if I want this irreducible polynomial of the minimum degree to have roots in both sqrt(2), sqrt(3), and sqrt(5)? How do I get this polynomial?

ps: The coefficients are all integers

## How I Find the reproduction number and make a grap...

Asked by:

please, help me..this is my model