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# john

Active since 2011

Professional Interests: electric circuit analysis

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Question

Ilaplace and simplify and more roots
For numeric solution I use and it works: s=ilaplace(result(i,1)); s=feval(symengine, 'float', s); syms t 'real' s=vpa(sq...

7 years ago | 0 answers | 0

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Question

When use || and | in if?
Hello, when can I use || and | in command if? For example: if a||b if a| b Thank you

7 years ago | 2 answers | 0

### 2

Question

Slow execution uitable with many characters
Hello, a has size for example (20,70000). If I insert a into uitable in GUI, than moving slide up/down or right/left is execu...

7 years ago | 2 answers | 0

### 2

Question

Analytical solution of ilaplace
Hello, numerical solution of ilaplace is done by: s=ilaplace(result(i,1)); s=feval(symengine, 'float', s); syms t ...

8 years ago | 1 answer | 0

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Question

vpa ,,,,why this result?
Hello, for code: vpa(33357.2537976768,4) I got: ans = 33388.0 but why not 33360.0? Thank you

8 years ago | 0 answers | 0

### 0

Question

Real part of symbolic complex
Hello, how can I get real part of this: syms u01 phiu01 R3 R1 C3 omega u02 phiu02 L1 -(2^(1/2)*R2*u01*sin((pi*(phiu01...

8 years ago | 0 answers | 0

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Question

uistack figure simulator top
Hello, software ( main figure) in gui has name Simulator. If I have opened two and more figures, and I use set(0,'Curre...

8 years ago | 1 answer | 0

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Question

Solution of electric circuit- result from ilaplace in complex form
Hello, please help. I solve electric circuit with resistors, inductor, kapacitors a sources. In final step, I need make...

8 years ago | 0 answers | 0

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Question

Calculation ilaplace ...roots? plot
Hello, I need make inverse Laplace transformation. I thing I got more roots. What can I do with this roots? I need make plot ...

8 years ago | 0 answers | 0

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Question

Waitbar error during calculation
Hello, if I press button "x"- that I want to close waitbar for example during for i=1:a during calculation, I got error, why?...

8 years ago | 1 answer | 0

### 1

Question

Different result command window and guide
Hello, if I write in command window: t=1 4.5582758767110180218764941687633*sin(314.0*t) - 16.557811525543529374688574...

8 years ago | 1 answer | 0

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Question

Calculation of cosh, sinh big numbers
Hi, let t is time. How can I calculate and plot: for i=1:10 y=0.912*sin(314.0*t) - 3.31*cos(314.0*t) + (3.31*(cosh(...

8 years ago | 1 answer | 0

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Question

Block and un-block items
Hello, in guide I have few pushbuttons, uitables, radiobuttons.....few are enabled and few of them are disabled... If I pr...

8 years ago | 2 answers | 0

### 2

Question

Why I got dirac
Hi, why I got dirac in result: a=ilaplace((134.66666666666666666666666666667*s - 134666.66666666666666666666666667)/(s^2 +...

8 years ago | 1 answer | 0

### 1

Question

ilaplace confusing - result from command window and from m file gui is not the same
Hi, I write in command window: ilaplace((0.99984898859777815438576453743735*s^2 + 1414.0*s - 414151.01140222184561423546...

8 years ago | 1 answer | 0

### 1

Question

Too big row width uitable
Hi, into row I want write for example iR1, where 1 is subscript. iR1 is current "i" in resistor "R1". This is my code: sym...

8 years ago | 1 answer | 0

### 1

Question

Problem in CurrentFigure or in gcf
Hi, this is my code after pressing pushbutton: h=findobj(0,'Type','figure','Tag','figure1'); UserData=get(h,'UserData'...

8 years ago | 2 answers | 0

### 2

Question

Math form and uitable
Hi, I have uitable and edit box. If I write 0.10000002 into edit box, than in uitable I get 0.10000002....this is ok. But if I w...

8 years ago | 1 answer | 0

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Question

Uitable with greek letters and subscript:
Hi, can you help me please? For example I want to show following string into uitable with greek letters and subscript: L1,alp...

8 years ago | 0 answers | 1

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Question

Column width in uitable
Hi, if I press button, then new figure appears with uitable. Column width is always the same. How can I change column width? ...

8 years ago | 1 answer | 0

### 1

Question

Where is the problem???
Hi, UserData.matrix(3,3) is type of cell, and d is also type of cell. I got this error: ??? Error using ==> mupadmex Er...

8 years ago | 1 answer | 0

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Question

0.9-0.89 is 0.010000000000000000208166817117217
Hi, why 0.9-0.89 is 0.010000000000000000208166817117217? I want to use it in: if a-b<c sprintf('error') end...... ...

8 years ago | 1 answer | 1

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Question

Hi, how can I do this? When I click on popup menu and I don't change a content, than print "You didnt change it". When I c...

8 years ago | 1 answer | 0

### 1

Question

Result ilaplace a number
Hi, from this code: a=55/4/sym('s^2'); b=ilaplace(a); I got: (55*t)/4 How can I get result like 13,75...

8 years ago | 2 answers | 0

### 2

Question

How to plot result of inverse laplace transformation ?
Hi, how can I plot result of inverse Laplace transformation? Example: b=(s^2-2*s+4); c=ilaplace(b) t=0:10; ...

8 years ago | 2 answers | 0

### 2

Question

Hi, why is not possible to load real number? For example "3.14"??? It works only with integer. UserData.matrix(1,1)=nu...

8 years ago | 1 answer | 0

### 1

Question

GUI and two .figs
Hi, I have two .figs. If I press button in fig 1, than is executed callback function button_Callback(hObject, eventdata...

8 years ago | 1 answer | 0

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Question

How to run .fig from another .fig and how to get values from one .fig to second .fig and oposite
Hi, I have two .figs a and b. How is it possible to run b.fig from a.fig? After run I need send any values from a.fig for ...

8 years ago | 0 answers | 0

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Question

How insert if/elseif/else statement into callback
Hi, how can I insert if/elseif/else into callback? This is my idea: uicontrol('Style','checkbox',... 'Unit...

9 years ago | 0 answers | 0