How to add/specify range of values for each variable in vpasolve?

How do I add specific ranges for each variables in vpasolve?

Example, for variable x, range of values should be 1 to 2. For variable y, range is 10 to 100. For variable z, range is 0 to 1.

Part of my code is given below.

syms x y z positive
eq1 =
eq2 =
eq3 =

sol=solve([eq1,eq2,eq3],[x,y,z]);

xsol=vpa(sol.x)
ysol=vpa(sol.y)
zsol=vpa(sol.z)

I tried the following below

syms x y z positive
eq1 =
eq2 =
eq3 =

range=[1 2; 10 100; 0 1]
sol=solve([eq1,eq2,eq3],[x,y,z],range);

xsol=vpa(sol.x)
ysol=vpa(sol.y)
zsol=vpa(sol.z)

but I got an error for the line "range=[1 2; 10 100; 0 1]"

Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII characters.

[madhan ravi]

Read the error text message once again.

[whiteribbon]

Thank you for that.

I changed this line to:

range=[1,2;10,100;0,1]

but a new error for the following line appears

sol=solve([eq1,eq2,eq3],[x,y,z],range);

together with these other errors

Error using sym.getEqnsVars>checkVariables (line 87)
Second argument must be a vector of symbolic variables.

Error in sym.getEqnsVars (line 54)
    checkVariables(vars);

Error in solve>getEqns (line 429)
[eqns, vars] = sym.getEqnsVars(argv{:});

Error in solve (line 226)
[eqns,vars,options] = getEqns(varargin{:});

Answer 1

[madhan ravi]

vpasolve() not solve()

[whiteribbon]

I entered this code instead

sol=vpasolve([eq1,eq2,eq3],[x,y,z],range);

but it gives me "Empty sym: 0-by-1".

Why is it though that when I don't specify any range (for another set of equations) the following code works (and it doesn't give me an empty solution)?

syms x y z positive
eq1 =
eq2 =
eq3 =
sol=solve([eq1,eq2,eq3],[x,y,z]);
xsol=vpa(sol.x)
ysol=vpa(sol.y)
zsol=vpa(sol.z)

I mean, I just used "sol=solve( )" and not "sol=vpasolve( )".

[madhan ravi]

See if the solution falls under your specified range if not perhaps the solution doesn’t exist within the specified range.

[whiteribbon]

If I don't specify any range (aside from positive in the line "syms x y z positive" , the matlab R2019a version runs the code but is always "Busy" and matlab doesn't respond when I try to pause it. However, in the R2016b version, I get this error

Error using mupadengine/feval (line 163)
The row index is out of range.

Error in solve (line 349)
            varargout{1}.(char(vars(i))) = transpose(eng.feval('map', solutions, '_index', i));

Error in  (line 26)
sol=solve([eq1,eq2,eq3],[a,b,c]);

[madhan ravi]

Please attach your script.

[whiteribbon]

I found a solution. Thank you so much for your help. :)

[madhan ravi]

And your solution was?

[Muhammad Adil]

Also having this problem, how you managed to solve bro plz share