Hi,
Here are the steps to do it:
1. Create Text Box for User Input:
- In App Designer, drag a 'Edit Field' component from the Layout palette onto your app window.
- Name this component appropriately, such as 'inputValue' or 'userInput', to reflect its purpose.
2. Design the Equation Display:
- Drag a 'Text Area' component from the Layout palette. This will hold the equation with placeholders for parameter values.
- Name this component 'equationDisplay' (or a similar name) for clarity.
3. Construct the Equation String:
- Within the callback function that gets executed when the user enters a value and presses a button (or triggers an update event), construct the equation string dynamically.
- Use string concatenation to combine the static equation parts with placeholders for the parameters.
Here's an illustrative example assuming the equation is F_H(S) = K / ((T_L * S + 1) * (T_1 * S + 1)) * (1 / (2 * zeta * wn^2)) * exp(-t * S):
function updateEquation(app)
% Get user input from the edit field
userInput = app.inputValue.Value;
% Define parameter values (replace with your actual calculations based on userInput)
K = ...; % Replace with calculation based on userInput
T_L = ...; % Replace with calculation based on userInput
T_1 = ...; % Replace with calculation based on userInput
zeta = ...; % Replace with calculation based on userInput
wn = ...; % Replace with calculation based on userInput
t = ...; % Replace with calculation based on userInput
% Construct the equation string with placeholders and calculated values
equationStr = ['F_H(S) = ', num2str(K), ' / ((', num2str(T_L), ' * S + 1) * (', num2str(T_1), ' * S + 1)) * (1 / (2 * ', num2str(zeta), ' * ', num2str(wn), '^2)) * exp(-', num2str(t), ' * S)'];
% Set the equation display text area with the constructed string
app.equationDisplay.Value = equationStr;
end
4. Call the Callback Function:
- Link the callback function (e.g., updateEquation) to a button press event or any other appropriate trigger in your app.
- When the event occurs, the callback function will execute, update the equation string with the latest parameter values, and display it in the text area.
Hope it helps
