How can I use NgFor without creating arrays to generate matrix UI pattern

Question

I would like to implement UI matrix pattern, which should generate dynamically. By receiving input parameter it should decide what would be UI matrix pattern dimensions: For

Answer 1

After reading all answers I managed to solve it:

 public chooseGamePattern() {
    if (this.cardType === 3) {
        this.horizontalElementLocation = 9;
        this.verticalElementLocation = 3;
        this.rows = new Array(this.verticalElementLocation);
        this.elements = new Array(this.horizontalElementLocation);
    }

It works for me. Thank You all!!!